{"product_id":"hochschicht-filter-polyester-gel-beschichtet","title":"High-film filters – When depth filtration meets Italian engineering","description":"\u003cp\u003e \u003cstrong\u003eIf you want crystal-clear water (not just \"clean enough,\" but \"diamond-clear\"). If you want to backflush less frequently (every 4 weeks instead of every week). If you want to invest in longevity (20+ years instead of 5-10 years).\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e They have a sand filter. Standard model (plastic, 500mm diameter, 400mm filter height). \u003cstrong\u003eThe problem:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eProblem #1: Filter bed too shallow\u003c\/strong\u003e \u003cbr\u003eStandard filters have \u003cstrong\u003ea filter height of 400-500 mm\u003c\/strong\u003e (shallow bed). Dirt is only filtered \u003cstrong\u003esuperficially\u003c\/strong\u003e (the top 10-15 cm of sand do its work, the bottom 25-30 cm do nothing). \u003cstrong\u003eThe result:\u003c\/strong\u003e the filter clogs quickly (the top layer is full) → you have to \u003cstrong\u003ebackwash every week\u003c\/strong\u003e (annoying, wastes water).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eProblem #2: Poor water quality\u003c\/strong\u003e\u003cbr\u003e A shallow filter means \u003cstrong\u003ecoarse filtration\u003c\/strong\u003e (only large particles are trapped; small particles pass through). \u003cstrong\u003eThe result:\u003c\/strong\u003e the water is \"clean\" (no leaves), but \u003cstrong\u003enot crystal clear\u003c\/strong\u003e (slightly milky; you can't see the bottom sharply at a depth of 2 meters). Crystal-clear purists are \u003cstrong\u003edissatisfied\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eProblem #3: Short standby time\u003c\/strong\u003e \u003cbr\u003eStandard filters clog quickly (shallow bed fills up) → \u003cstrong\u003epressure rises\u003c\/strong\u003e (pressure gauge shows 1.5 bar instead of 0.8 bar) → backwashing is necessary (every week). \u003cstrong\u003eThis wastes:\u003c\/strong\u003e water (500-1,000 liters per backwash), time (20 minutes of work), and chemicals (water is diluted → pH value fluctuates → readjustment required).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eProblem #4: Cheap material ages\u003c\/strong\u003e\u003cbr\u003e Standard filter: Plastic (PE, PP – not UV-resistant) → becomes \u003cstrong\u003ebrittle\u003c\/strong\u003e after 5-10 years (sun destroys material) → cracks develop → filter leaks → \u003cstrong\u003ereplacement necessary\u003c\/strong\u003e (€300-€800).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eThere is a solution. One that solves all four problems at once – for the next 20 years.\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp\u003eThe deepbed filter – a \u003cstrong\u003edepth filter made of fiberglass-reinforced, yellow-coated polyester\u003c\/strong\u003e . Made in Italy. \u003cstrong\u003eThe special feature:\u003c\/strong\u003e \u003cstrong\u003e50% deeper filter bed\u003c\/strong\u003e (up to 950mm filter height instead of 400mm) → dirt is distributed \u003cstrong\u003eover the entire depth\u003c\/strong\u003e (not just at the top) → filter clogs \u003cstrong\u003e3-4 times slower\u003c\/strong\u003e → you backwash \u003cstrong\u003eevery 4 weeks\u003c\/strong\u003e (instead of every week) → water is \u003cstrong\u003ecrystal clear\u003c\/strong\u003e (diamond quality).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhat you will receive:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eDepth filtration (high-bed principle)\u003c\/strong\u003e – 50% deeper filter bed = dirt is distributed evenly over the entire depth\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eBackwash every 4 weeks\u003c\/strong\u003e (instead of every week – saves 75% water + time)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCrystal-clear water quality\u003c\/strong\u003e – the finest particles are trapped (you can see the bottom clearly at a depth of 3m)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFiberglass reinforced polyester + gelcoat\u003c\/strong\u003e – UV-resistant, chemical-resistant, 20+ year lifespan\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eTransparent lid\u003c\/strong\u003e – you can see the filter bed (inspection without opening)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003e6-way valve\u003c\/strong\u003e – all operating modes (filter, backwash, rinse, drain, circulate, closed)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003e3 sizes\u003c\/strong\u003e – for pools 80-180 m³ (Ø 650mm, Ø 800mm, Ø 950mm)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eMade in Italy\u003c\/strong\u003e – professional manufacturing, not cheap goods\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eWorking pressure 2.5 bar\u003c\/strong\u003e – robust, safe, durable\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eThe result:\u003c\/strong\u003e You only need to backwash \u003cstrong\u003eevery 4 weeks\u003c\/strong\u003e (instead of every week) = \u003cstrong\u003e75% less work\u003c\/strong\u003e + \u003cstrong\u003e75% less water waste\u003c\/strong\u003e (36,000 liters\/year saved with 12 backwashes instead of 48). \u003cstrong\u003ePlus:\u003c\/strong\u003e The water is \u003cstrong\u003ecrystal clear\u003c\/strong\u003e (not \"clean enough\", but \"diamond clear\").\u003c\/p\u003e\n\n \u003cp\u003eSaturday, 10:00 AM. \u003cstrong\u003eStandard filter:\u003c\/strong\u003e Pressure gauge reads 1.5 bar (pressure increased, filter bed clogged) → You must backwash (valve on \"Backwash\", pump on, wait 5 minutes, 1,000 liters of water wasted). \u003cstrong\u003eHigh-bed filter:\u003c\/strong\u003e Pressure gauge reads 0.9 bar (normal pressure, filter bed working evenly) → \u003cstrong\u003eYou can continue swimming\u003c\/strong\u003e (no backwashing necessary – filter will run for another 3 weeks).\u003c\/p\u003e\n\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2\u003e The 5 most important advantages at a glance:\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eDepth filtration = 3-4x longer service life\u003c\/strong\u003e : 50% deeper filter bed (650-950mm height instead of 400mm), dirt is distributed over the entire depth (not just the top 10 cm), filter clogs 3-4x slower, backwashing every 4 weeks (instead of every week = 75% less work)\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eCrystal-Clear water quality = diamond clarity\u003c\/strong\u003e : The finest particles are trapped (even 10-20 microns – the smallest suspended solids), the water is not just \"clean\" but \"crystal clear\", you can see the bottom sharply at a depth of 3m (like freshly cleaned glasses), Crystal-Clear purists are happy\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFiberglass reinforced polyester + gelcoat = 20+ year lifespan\u003c\/strong\u003e : GRP reinforcement (like boat hulls – extremely robust), gelcoat outer coating (UV-resistant, chemical-resistant), no yellowing, no embrittlement, no aging (sun\/chlorine do not damage the material), 20+ years of use (standard filters: 5-10 years)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTransparent lid = visual inspection without opening\u003c\/strong\u003e : You can see the filter bed (sand level, degree of contamination) without opening the filter, know exactly when backwashing is necessary (no guessing – see), save time (no unnecessary opening\/closing)\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003e3 sizes for pools 80-180 m³ = perfect scaling\u003c\/strong\u003e : Ø 650mm (up to 80 m³, small pools), Ø 800mm (up to 140 m³, family pools), Ø 950mm (up to 180 m³, large pools), each size optimally dimensioned (not oversized, not undersized)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2\u003e For whom is this high-efficiency filter ideally suited?\u003c\/h2\u003e\n\n\u003cp\u003e \u003cstrong\u003eReality check\u003c\/strong\u003e : The high-layer filter is for \u003cstrong\u003eCrystal Clear purists and maintenance haters\u003c\/strong\u003e who want the \u003cstrong\u003ebest water quality\u003c\/strong\u003e and \u003cstrong\u003einfrequent backwashing\u003c\/strong\u003e – and are willing to invest in \u003cstrong\u003epremium quality\u003c\/strong\u003e (more expensive than standard filters, but pays for itself through longevity and water savings).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ \"Crystal Clear Purists\" – people for whom water quality is binary\u003c\/strong\u003e \u003cbr\u003eYou're a perfectionist. \u003cstrong\u003eWater quality is binary for you:\u003c\/strong\u003e either it's \"diamond clear\" (you can see every grain of sand at a depth of 3 meters) or it's dirty. \u003cstrong\u003eSlight turbidity is unbearable.\u003c\/strong\u003e Standard filter: water is \"okay\" (no leaves, but slightly milky – 20-50 micron particles float through). \u003cstrong\u003eHigh-performance filter:\u003c\/strong\u003e water is \u003cstrong\u003ecrystal clear\u003c\/strong\u003e (even 10-20 micron particles are trapped – the finest suspended solids). \u003cstrong\u003eYou're happy.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ People who hate backflushing (waste of time + waste of water)\u003c\/strong\u003e \u003cbr\u003eBackwashing is a pain. Every week: go to the equipment room, turn the valve to \"Backwash,\" start the pump, wait 5 minutes, turn the valve to \"Rinse,\" wait another 2 minutes, then turn the valve back to \"Filter.\" \u003cstrong\u003e20 minutes of work. 1,000 liters of water wasted.\u003c\/strong\u003e At 48 times a year: \u003cstrong\u003e16 hours of work + 48,000 liters of water wasted.\u003c\/strong\u003e With a high-layer filter: \u003cstrong\u003ebackwashing every 4 weeks\u003c\/strong\u003e (12 times a year) = \u003cstrong\u003e4 hours of work + 12,000 liters of water\u003c\/strong\u003e = \u003cstrong\u003e75% saved\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ People with variable filter pumps (Flotide, Inverter) – which filter 24\/7\u003c\/strong\u003e\u003cbr\u003e They have an inverter pump (runs 24 hours at low speed – slow continuous filtration). \u003cstrong\u003eThe problem with standard filters:\u003c\/strong\u003e the shallow filter bed still clogs quickly (because continuous filtration = a lot of dirt over time). \u003cstrong\u003eHigh-bed filters:\u003c\/strong\u003e deep filter bed = dirt is distributed → filter clogs \u003cstrong\u003emuch more slowly\u003c\/strong\u003e → \u003cstrong\u003eperfect for 24\/7 filtration\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003e✓ People with large pools (60+ m³) – who need high flow rates\u003c\/strong\u003e\u003cbr\u003e Your pool is 10 x 5m (50 m³) or larger. \u003cstrong\u003eYou need:\u003c\/strong\u003e a flow rate of 25-35 m³\/h (for two circulations per day). Standard filter (Ø 500mm): \u003cstrong\u003eToo small\u003c\/strong\u003e → filter speed \u0026gt;60 m\/h (too fast – water rushes through, filtration is poor). \u003cstrong\u003eHigh-bed filter Ø 800mm:\u003c\/strong\u003e 25 m³\/h at a filter speed \u0026lt;50 m\/h (optimal – water flows slowly through the filter bed = better filtration).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ People with heat pumps\/solar panels – optimizing the overall system\u003c\/strong\u003e\u003cbr\u003e Your pool is heated (heat pump €3,000, solar heating €2,000). \u003cstrong\u003eYou want:\u003c\/strong\u003e The system to run efficiently (lower filter velocity = heat pump works better). High-profile filter (larger filter surface) → \u003cstrong\u003elower filter velocity\u003c\/strong\u003e → heat pump\/solar works \u003cstrong\u003emore efficiently\u003c\/strong\u003e (less pressure loss = less pump load).\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003e✓ People with saltwater pools – who need corrosion-free material\u003c\/strong\u003e\u003cbr\u003e Your pool uses salt electrolysis (5-10 g\/L salt). \u003cstrong\u003eA problem with standard filters is that\u003c\/strong\u003e the plastic ages faster (salt attacks the material). \u003cstrong\u003eHigh-layer filters (GRP + gelcoat) are\u003c\/strong\u003e \u003cstrong\u003ecorrosion-free\u003c\/strong\u003e (salt\/chlorine do not damage the material) → same lifespan as freshwater pools.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ People who want to make a real investment once (20+ years of use)\u003c\/strong\u003e\u003cbr\u003e They hate the saying \"buy cheap, buy twice.\" Standard filters (€300-€600): Last 5-10 years → \u003cstrong\u003eneed to be replaced 2-4 times\u003c\/strong\u003e (over 20 years) = \u003cstrong\u003e€1,200-€2,400 total\u003c\/strong\u003e . High-performance filters (€800-€1,500): Last 20+ years → \u003cstrong\u003eone-time investment\u003c\/strong\u003e = \u003cstrong\u003echeaper in the long run\u003c\/strong\u003e (plus: better water quality + less maintenance).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e✓ People with premium pool facilities (who appreciate attention to detail)\u003c\/strong\u003e \u003cbr\u003eYour pool is premium (natural stone terrace, LED lighting, counter-current system, pool robot). \u003cstrong\u003eYou want:\u003c\/strong\u003e Every component to be premium quality (no cheap filter next to a €5,000 heat pump). High-performance filter: \u003cstrong\u003eMade in Italy\u003c\/strong\u003e (professional manufacturing), \u003cstrong\u003etransparent cover\u003c\/strong\u003e (meticulous attention to detail), \u003cstrong\u003eGRP + gelcoat\u003c\/strong\u003e (like a luxury yacht) → \u003cstrong\u003ematches a premium system\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2\u003e Product description: When depth meets uniformity\u003c\/h2\u003e\n\n\u003cp\u003e \u003cstrong\u003eThe concept: Depth filtration = dirt is distributed over the entire height\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e Standard sand filters have \u003cstrong\u003ea filter height of 400-500mm\u003c\/strong\u003e (shallow bed). \u003cstrong\u003eProblem:\u003c\/strong\u003e Dirt collects in \u003cstrong\u003ethe top 10-15 cm\u003c\/strong\u003e (where the flow velocity is highest) → the bottom 25-30 cm \u003cstrong\u003ehardly\u003c\/strong\u003e function → the filter clogs quickly (the top layer is full, the bottom layer is empty).\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eDeepbed filters have a filter height of 650-950 mm\u003c\/strong\u003e (50% deeper). \u003cstrong\u003eAdvantage:\u003c\/strong\u003e Dirt is distributed \u003cstrong\u003eevenly across the entire depth\u003c\/strong\u003e (top, middle, and bottom layers all work together) → filter clogs \u003cstrong\u003e3-4 times slower\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhy is that?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eFilter velocity\u003c\/strong\u003e (m\/h) = flow rate (m³\/h) ÷ filter area (m²).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eExample standard filter (Ø 600mm):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Filter area: 0.28 m²\u003c\/li\u003e\n\n\u003cli\u003e Flow rate: 15 m³\/h\u003c\/li\u003e\n\n\u003cli\u003e Filter speed: 15 ÷ 0.28 = \u003cstrong\u003e54 m\/h\u003c\/strong\u003e (too fast – water rushes through)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eExample high-film filter (Ø 800mm):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Filter area: 0.50 m²\u003c\/li\u003e\n\n\u003cli\u003e Flow rate: 15 m³\/h\u003c\/li\u003e\n\n\u003cli\u003e Filter velocity: 15 ÷ 0.50 = \u003cstrong\u003e30 m\/h\u003c\/strong\u003e (optimal – water flows slowly)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp\u003e\u003cstrong\u003eAt low filtration speeds:\u003c\/strong\u003e Water flows slowly through the filter bed → dirt is distributed \u003cstrong\u003eover the entire depth\u003c\/strong\u003e (not just at the top) → filter works \u003cstrong\u003eevenly\u003c\/strong\u003e → clogs \u003cstrong\u003emuch more slowly\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e Fiberglass reinforced polyester + gelcoat – 20+ year lifespan\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eMaterial:\u003c\/strong\u003e GRP (glass fiber reinforced plastic) + gelcoat outer coating.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhat is GRP?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003ePolyester resin\u003c\/strong\u003e (plastic) + \u003cstrong\u003eglass fibers\u003c\/strong\u003e (woven) → laminated together → results in \u003cstrong\u003eGRP\u003c\/strong\u003e (extremely stable, lightweight, corrosion-free).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhere is GRP used?\u003c\/strong\u003e Boat hulls (sailboats, motorboats), wind turbine blades, sports car bodies (Lotus, Corvette) – anywhere where \u003cstrong\u003eextreme robustness + lightness + durability\u003c\/strong\u003e is required.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhat is gelcoat?\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eOuter coating\u003c\/strong\u003e (similar to paint, but thicker) → protects GRP from UV radiation, chemicals, and mechanical wear.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eAdvantages of GRP + Gelcoat:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eUV-resistant\u003c\/strong\u003e (sun does not damage material – no yellowing, no embrittlement)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eChemical resistant\u003c\/strong\u003e (chlorine, salt, pH minus – none of these attack the material)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCorrosion-free\u003c\/strong\u003e (no rust, no oxidation – ideal for saltwater)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSmooth surface\u003c\/strong\u003e (gelcoat is mirror-smooth – easy to clean, no biofilm formation)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003e20+ years lifespan\u003c\/strong\u003e (with proper use – like boat hulls)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eComparison to standard filters (PE\/PP plastic):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eStandard filter:\u003c\/strong\u003e PE\/PP plastic (polyethylene, polypropylene) → \u003cstrong\u003enot UV-resistant\u003c\/strong\u003e (sun destroys material) → becomes \u003cstrong\u003ebrittle\u003c\/strong\u003e after 5-10 years → cracks develop → \u003cstrong\u003ereplacement required\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eHigh-film filter:\u003c\/strong\u003e GRP + Gelcoat → \u003cstrong\u003eUV-resistant\u003c\/strong\u003e → no embrittlement → \u003cstrong\u003elasts 20+ years\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e Transparent lid – visual inspection without opening\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eStandard filter:\u003c\/strong\u003e Lid is \u003cstrong\u003eopaque\u003c\/strong\u003e (white, grey) → You \u003cstrong\u003ecannot\u003c\/strong\u003e see what is inside → \u003cstrong\u003eYou have to guess\u003c\/strong\u003e when backwashing is necessary (according to manometer pressure – but the manometer only shows \"symptom\", not \"cause\").\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eHigh-layer filter:\u003c\/strong\u003e The lid is \u003cstrong\u003etransparent\u003c\/strong\u003e (see-through) → You can see \u003cstrong\u003ethe filter bed\u003c\/strong\u003e (sand level, degree of contamination, water level).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhat can you see?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSand level\u003c\/strong\u003e (is there enough sand? Or was sand lost during backwashing?)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eLevel of contamination\u003c\/strong\u003e (top layer dark = filter is full → backwashing required)\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eWater level\u003c\/strong\u003e (is the filter properly vented? Or is there air in the system?)\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eCracks\/damage\u003c\/strong\u003e (is the filter bed uniform? Or has a channel formed – \"channeling\" = water flows through a channel, bypassing the filter bed)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eAdvantage:\u003c\/strong\u003e You \u003cstrong\u003ecan see\u003c\/strong\u003e exactly when backwashing is necessary (no guessing) → You \u003cstrong\u003esave time\u003c\/strong\u003e (no unnecessary opening\/checking) + \u003cstrong\u003eoptimize the backwash interval\u003c\/strong\u003e (not too early, not too late).\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e 6-way valve – All operating modes\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eStandard in all high-layer filters:\u003c\/strong\u003e 6-way valve (top-mount, mounted on the lid).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e6 operating modes:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e1. Filter (Filtering):\u003c\/strong\u003e Normal operation. Water flows from top to bottom through the filter bed → filtered → back to the pool.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e2. Backwash:\u003c\/strong\u003e Water flows \u003cstrong\u003efrom bottom to top\u003c\/strong\u003e (reverse direction) → filter bed is stirred up → dirt is rinsed out → flows into wastewater.\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003e3. Rinse:\u003c\/strong\u003e After backwashing. Water flows normally (top to bottom) → rinses away any remaining dirt → flows into the wastewater (not back to the pool).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e4. Waste (Emptying):\u003c\/strong\u003e Water flows \u003cstrong\u003edirectly\u003c\/strong\u003e from pool to wastewater (bypassing filters) → for pool emptying, basic cleaning, water changes.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e5. Recirculate:\u003c\/strong\u003e Water flows \u003cstrong\u003edirectly\u003c\/strong\u003e back to the pool (bypassing the filter) → for chemical distribution (e.g., after shock chlorination → distribute chlorine evenly without filtering).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e6. Closed:\u003c\/strong\u003e All valves closed → no water flows → for maintenance (opening filters, changing sand, repairs).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eImportant:\u003c\/strong\u003e \u003cstrong\u003eOnly switch the valve when the pump is off\u003c\/strong\u003e (pump off → switch valve → pump on) → otherwise the valve will be damaged.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e Depth filtration (high-layer principle) – dirt distributed over the entire depth\u003c\/h3\u003e\n\n \u003cp\u003e\u003cstrong\u003eHow does depth filtration work?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e Water flows \u003cstrong\u003efrom top to bottom\u003c\/strong\u003e through a filter bed (quartz sand or glass filter medium, 0.4-1.2 mm grain size).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eFor standard filters (400mm height):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Water flows through quickly (high filter speed 50-60 m\/h)\u003c\/li\u003e\n\n\u003cli\u003e Dirt collects in \u003cstrong\u003ethe top 10-15 cm\u003c\/strong\u003e (where the current is strongest).\u003c\/li\u003e\n\n\u003cli\u003e The lower 25-30 cm \u003cstrong\u003ehardly\u003c\/strong\u003e function (water flows through channels – \"channeling\")\u003c\/li\u003e\n\n\u003cli\u003e Filter clogs quickly (top layer is full)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eFor high-profile filters (650-950mm height):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Water flows through \u003cstrong\u003eslowly\u003c\/strong\u003e (low filter speed 30-40 m\/h)\u003c\/li\u003e\n\n\u003cli\u003e Dirt is distributed \u003cstrong\u003eevenly\u003c\/strong\u003e over the entire depth (working on the upper, middle, and lower layers).\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eNo channeling\u003c\/strong\u003e (no channels – water permeates the entire filter bed)\u003c\/li\u003e\n\n\u003cli\u003e Filter clogs \u003cstrong\u003e3-4 times slower\u003c\/strong\u003e (all layers work evenly)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp\u003e\u003cstrong\u003eThe result:\u003c\/strong\u003e You backflush \u003cstrong\u003eevery 4 weeks\u003c\/strong\u003e (instead of every week) = \u003cstrong\u003e75% less work + 75% less water waste\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e Crystal-clear water quality – finest particles trapped\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eStandard filter:\u003c\/strong\u003e Filters particles \u003cstrong\u003e\u0026gt;30-50 microns\u003c\/strong\u003e (large particles – leaves, insects, sand).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eHigh-film filter:\u003c\/strong\u003e Filters particles \u003cstrong\u003e\u0026gt;10-20 microns\u003c\/strong\u003e (finest suspended particles – dust, pollen, bacteria).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eWhy is a high-layer filter finer?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eSlower filter speed\u003c\/strong\u003e (30-40 m\/h instead of 50-60 m\/h) → water flows slowly through the filter bed → particles have \u003cstrong\u003emore time\u003c\/strong\u003e to attach to sand grains → \u003cstrong\u003efiner filtration\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003ePlus:\u003c\/strong\u003e Deeper filter bed (650-950mm instead of 400mm) → particles have to \u003cstrong\u003etravel a longer distance\u003c\/strong\u003e through sand → more opportunities to be trapped → \u003cstrong\u003efiner filtration\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eThe result:\u003c\/strong\u003e water is not only \"clean\" (no leaves), but \u003cstrong\u003e\"crystal clear\"\u003c\/strong\u003e (no suspended particles – you can see the bottom at a depth of 3m \u003cstrong\u003esharply\u003c\/strong\u003e , like freshly cleaned glasses).\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch3\u003e 3 sizes – For pools 80-180 m³\u003c\/h3\u003e\n\n\u003cp\u003e \u003cstrong\u003eSize 1: Ø 650mm\u003c\/strong\u003e (for pools up to 80 m³)\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eTechnical data:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Diameter: 650mm\u003c\/li\u003e\n\n\u003cli\u003e Filter area: 0.33 m²\u003c\/li\u003e\n\n\u003cli\u003e Max. flow rate: 15 m³\/h\u003c\/li\u003e\n\n\u003cli\u003e Max. pool volume: 80 m³\u003c\/li\u003e\n\n\u003cli\u003e Amount of sand: 475 kg (approx. 350 liters of sand)\u003c\/li\u003e\n\n\u003cli\u003e Connection: 1½\" external thread\u003c\/li\u003e\n\n\u003cli\u003e Weight: 44 kg\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Small pools (6 x 3m, 20 m³)\u003c\/li\u003e\n\n\u003cli\u003e Above-ground pools (Ø 4.5m, 15 m³)\u003c\/li\u003e\n\n\u003cli\u003e Compact technical rooms (limited space)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eSize 2: Ø 800mm\u003c\/strong\u003e (for pools up to 140 m³)\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eTechnical data:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Diameter: 800mm\u003c\/li\u003e\n\n\u003cli\u003e Filter area: 0.50 m²\u003c\/li\u003e\n\n\u003cli\u003e Max. flow rate: 25 m³\/h\u003c\/li\u003e\n\n\u003cli\u003e Max. pool volume: 140 m³\u003c\/li\u003e\n\n\u003cli\u003e Amount of sand: 675 kg (approx. 500 liters of sand)\u003c\/li\u003e\n\n\u003cli\u003e Connection: 2\" external thread\u003c\/li\u003e\n\n\u003cli\u003e Weight: 52 kg\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Family pools (8 x 4m, 32 m³)\u003c\/li\u003e\n\n \u003cli\u003ePools with heat pump (medium flow rates)\u003c\/li\u003e\n\n\u003cli\u003e Standard technical rooms\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eSize 3: Ø 950mm\u003c\/strong\u003e (for pools up to 180 m³)\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eTechnical data:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Diameter: 950mm\u003c\/li\u003e\n\n\u003cli\u003e Filter area: 0.71 m²\u003c\/li\u003e\n\n\u003cli\u003e Max. flow rate: 35 m³\/h\u003c\/li\u003e\n\n\u003cli\u003e Max. pool volume: 180 m³\u003c\/li\u003e\n\n\u003cli\u003e Amount of sand: 920 kg (approx. 680 liters of sand)\u003c\/li\u003e\n\n\u003cli\u003e Connection: 2\" external thread\u003c\/li\u003e\n\n\u003cli\u003e Weight: 65 kg\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Large pools (10 x 5m, 50 m³)\u003c\/li\u003e\n\n\u003cli\u003e Premium systems (high circulation rates)\u003c\/li\u003e\n\n\u003cli\u003e 24\/7 continuous filtration (quiet, slow, efficient)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch2\u003e Technical specifications at a glance\u003c\/h2\u003e\n\n\u003cp\u003e \u003cstrong\u003eCommon features (all sizes):\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Filter body: Glass fiber reinforced polyester (GRP)\u003c\/li\u003e\n\n\u003cli\u003e Exterior coating: Gelcoat (UV \u0026amp; chemical resistant)\u003c\/li\u003e\n\n\u003cli\u003e Lid: Transparent (visual inspection)\u003c\/li\u003e\n\n\u003cli\u003e Color: White\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eOperation:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Valve: 6-way valve (top-mount)\u003c\/li\u003e\n\n\u003cli\u003e Working pressure: 2.5 bar\u003c\/li\u003e\n\n\u003cli\u003e Maximum operating temperature: 42°C\u003c\/li\u003e\n\n\u003cli\u003e Pressure gauge: Integrated\u003c\/li\u003e\n\n\u003cli\u003e Backwash limit: ≥0.5 kPa (≥0.5 bar pressure increase)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eFiltration:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n \u003cli\u003eFilter material: Quartz sand or glass filter medium (0.4-1.2 mm)\u003c\/li\u003e\n\n\u003cli\u003e Filter depth: 650-950mm (high-layer principle)\u003c\/li\u003e\n\n\u003cli\u003e Filter velocity: \u0026lt;50 m\/h (optimal)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eManufacturer:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Made in Italy (professional manufacturing)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eSize comparison:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e Model\u003c\/th\u003e\n\n\u003cth\u003e O\u003c\/th\u003e\n\n\u003cth\u003e Filter area\u003c\/th\u003e\n\n\u003cth\u003e Max. flow rate\u003c\/th\u003e\n\n\u003cth\u003e Max. Pool\u003c\/th\u003e\n\n\u003cth\u003e Amount of sand\u003c\/th\u003e\n\n\u003cth\u003e Connection\u003c\/th\u003e\n\n\u003cth\u003e Weight\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e Ø 650mm\u003c\/td\u003e\n\n\u003ctd\u003e 650mm\u003c\/td\u003e\n\n\u003ctd\u003e 0.33 m²\u003c\/td\u003e\n\n\u003ctd\u003e 15 m³\/h\u003c\/td\u003e\n\n\u003ctd\u003e 80 m³\u003c\/td\u003e\n\n\u003ctd\u003e 475 kg\u003c\/td\u003e\n\n\u003ctd\u003e 1½\"\u003c\/td\u003e\n\n\u003ctd\u003e 44 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e Ø 800mm\u003c\/td\u003e\n\n\u003ctd\u003e 800mm\u003c\/td\u003e\n\n\u003ctd\u003e 0.50 m²\u003c\/td\u003e\n\n\u003ctd\u003e 25 m³\/h\u003c\/td\u003e\n\n\u003ctd\u003e 140 m³\u003c\/td\u003e\n\n\u003ctd\u003e 675 kg\u003c\/td\u003e\n\n\u003ctd\u003e 2\"\u003c\/td\u003e\n\n\u003ctd\u003e 52 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e Ø 950mm\u003c\/td\u003e\n\n\u003ctd\u003e 950mm\u003c\/td\u003e\n\n\u003ctd\u003e 0.71 m²\u003c\/td\u003e\n\n\u003ctd\u003e 35 m³\/h\u003c\/td\u003e\n\n\u003ctd\u003e 180 m³\u003c\/td\u003e\n\n\u003ctd\u003e 920 kg\u003c\/td\u003e\n\n\u003ctd\u003e 2\"\u003c\/td\u003e\n\n\u003ctd\u003e 65 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2\u003e Scope of delivery\u003c\/h2\u003e\n\n\u003cp\u003e ✓ High-performance filter (GRP + gelcoat, white)\u003cbr\u003e ✓ 6-way valve (top-mount, with handle)\u003cbr\u003e ✓ Transparent lid (visual inspection)\u003cbr\u003e ✓ Manometer (integrated pressure gauge)\u003cbr\u003e ✓ Connection set (1½\" or 2\") external thread\u003cbr\u003e ✓ Assembly instructions\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eNot included in the delivery:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Filter sand or glass filter medium (order separately – 475\/675\/920 kg depending on size)\u003c\/li\u003e\n\n\u003cli\u003e Pipes (PVC pipes 50\/63mm)\u003c\/li\u003e\n\n\u003cli\u003e Filter pump (separate – e.g. Flotide E-Turbo VS recommended)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch2\u003e Why people choose the high-level filter\u003c\/h2\u003e\n\n \u003cp\u003e\u003cstrong\u003e\"Previously: Backwashing every week (48 times\/year, 16 hours of work, 48,000 liters of water wasted). With a high-layer filter: Backwashing every 4 weeks (12 times\/year, 4 hours, 12,000 liters). I save 75% of the work and water.\"\u003c\/strong\u003e\u003cbr\u003e \u003cem\u003e– Mr. K., 52 years old, maintenance hater\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e\"My water used to be 'okay' (no leaves, but slightly milky). With a high-level filter: diamond clear. I can see every grain of sand at the bottom 3m deep. Crystal clear quality. Finally satisfied.\"\u003c\/strong\u003e\u003cbr\u003e \u003cem\u003e– Ms. M., 48 years old, Crystal Clear purist\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e\"I have a Flotide inverter pump (runs 24\/7 at 900 rpm). The old standard filter still clogged every week. High-profile filter Ø 950mm: clogs only every 4 weeks (deep filter bed distributes dirt evenly). Perfect for 24\/7 filtration.\"\u003c\/strong\u003e\u003cbr\u003e \u003cem\u003e– Mr. S., 55 years old, permanent filtration\u003c\/em\u003e\u003c\/p\u003e\n\n \u003cp\u003e\"The transparent lid is brilliant. \u003cstrong\u003eI can see exactly when backwashing is necessary\u003c\/strong\u003e (the top layer of sand turns dark). Before: I guessed (by the pressure gauge). Now: I see. Much better.\"\u003cbr\u003e \u003cem\u003e– Ms. L., 50 years old, detail optimizer\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e\"The difference in GRP + gelcoat quality is noticeable. My old PE filter became brittle (cracks) after 7 years. High-film filter (Made in Italy): Feels like a luxury yacht hull. Will last 20+ years.\"\u003c\/strong\u003e\u003cbr\u003e \u003cem\u003e– Mr. T., 58 years old, premium investor\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch2\u003e Frequently Asked Questions – Honest Answers\u003c\/h2\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Does a high-layer filter really save 75% backwash water?\u003c\/strong\u003e\u003cbr\u003e A: \u003cstrong\u003eYes\u003c\/strong\u003e (with the same filter performance). Standard filter: Backwash every week (48 times\/year x 1,000 liters = 48,000 liters). High-layer filter: Backwash every 4 weeks (12 times\/year x 1,000 liters = 12,000 liters). \u003cstrong\u003eSavings: 36,000 liters\/year\u003c\/strong\u003e = 75%.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: What size pool do I need?\u003c\/strong\u003e \u003cbr\u003eA: \u003cstrong\u003eRule of thumb:\u003c\/strong\u003e Pool volume (m³) ÷ 6 = minimum flow rate (m³\/h). \u003cstrong\u003eExample:\u003c\/strong\u003e Pool 48 m³ ÷ 6 = 8 m³\/h minimum flow rate. \u003cstrong\u003eRecommendation:\u003c\/strong\u003e Choose a filter \u003cstrong\u003elarger\u003c\/strong\u003e than the minimum (for a lower filtration rate). \u003cstrong\u003eFor a 48 m³ pool:\u003c\/strong\u003e Ø 800 mm (25 m³\/h) instead of Ø 650 mm (15 m³\/h) → better filtration.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Does it work with any sand (or do I need special sand)?\u003c\/strong\u003e\u003cbr\u003e A: \u003cstrong\u003eStandard quartz sand\u003c\/strong\u003e (0.4-1.2 mm grain size) works. \u003cstrong\u003eBetter:\u003c\/strong\u003e Glass filter medium (AFM, recycled glass) → finer filtration (filters particles \u0026gt;10 microns), longer lifespan (no sand change every 3-5 years). \u003cstrong\u003eHigh-layer filters work with both.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Is installation complicated?\u003c\/strong\u003e \u003cbr\u003eA: \u003cstrong\u003eMedium.\u003c\/strong\u003e The filter is heavy (44-65 kg \u003cstrong\u003eempty\u003c\/strong\u003e , 500-1,000 kg \u003cstrong\u003efull of sand\u003c\/strong\u003e ) → requires \u003cstrong\u003ea stable base\u003c\/strong\u003e (concrete slab, screed – not a wooden floor). \u003cstrong\u003eHydraulic connection\u003c\/strong\u003e (50\/63 mm pipes) → manageable for a tradesperson. \u003cstrong\u003eFilling with sand\u003c\/strong\u003e → time-consuming (pour 475-920 kg of sand into the filter, slowly and carefully). \u003cstrong\u003eRecommendation:\u003c\/strong\u003e Hire a professional for installation (saves time and reduces the risk of errors).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: How often do I need to change the sand?\u003c\/strong\u003e\u003cbr\u003e A: \u003cstrong\u003eQuartz sand:\u003c\/strong\u003e Every 3-5 years (sand becomes rounded due to backwashing → filters less effectively). \u003cstrong\u003eGlass filter medium:\u003c\/strong\u003e 8-10 years (glass does not become rounded → filters well for longer). \u003cstrong\u003eHigh-layer filter (due to infrequent backwashing):\u003c\/strong\u003e Sand lasts \u003cstrong\u003elonger\u003c\/strong\u003e (less mechanical stress).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Does it work with a saltwater pool?\u003c\/strong\u003e \u003cbr\u003eA: \u003cstrong\u003eYes\u003c\/strong\u003e (GRP + gelcoat is corrosion-free). Saltwater\/chlorine do not attack the material. Same lifespan as freshwater pools.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Transparent lid yellows (becomes cloudy)?\u003c\/strong\u003e\u003cbr\u003e A: \u003cstrong\u003ePossible\u003c\/strong\u003e (after 10-15 years of UV exposure). \u003cstrong\u003eHowever:\u003c\/strong\u003e Yellowing is purely cosmetic (functionality remains unchanged). \u003cstrong\u003eThe lid is replaceable\u003c\/strong\u003e (replacement part costs €50-100).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Is a high-level filter worthwhile for a small pool (20 m³)?\u003c\/strong\u003e\u003cbr\u003e A: \u003cstrong\u003eIt depends.\u003c\/strong\u003e For a small pool \u003cstrong\u003e, the absolute benefit is minimal\u003c\/strong\u003e (you backwash less often, but only save 20,000 liters\/year instead of 36,000 liters\/year). \u003cstrong\u003eA high-performance filter is worthwhile for pools of 40-50 m³ or more\u003c\/strong\u003e (where backwash frequency and water consumption are significant).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eQ: Can I use a high-level filter with an old pump?\u003c\/strong\u003e \u003cbr\u003eA: \u003cstrong\u003eYes\u003c\/strong\u003e (works with any pump). \u003cstrong\u003eHowever:\u003c\/strong\u003e High-layer filters work \u003cstrong\u003ebest\u003c\/strong\u003e with a variable-speed pump (Flotide, inverter) → low filter velocity (30-40 m\/h) → optimal depth filtration. \u003cstrong\u003eWith an older pump\u003c\/strong\u003e (single speed, full throttle): It works, but the filter is not used optimally.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003ch2\u003e Secure your Crystal Clear water + 75% less backwashing now!\u003c\/h2\u003e\n\n\u003cp\u003e \u003cstrong\u003eIf you want crystal-clear water. If you want to backflush less often. If you want to make a proper investment once – for the next 20 years.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e The high-layer filter is built for \u003cstrong\u003eCrystal Clear purists and maintenance haters\u003c\/strong\u003e who want the \u003cstrong\u003ebest water quality\u003c\/strong\u003e , \u003cstrong\u003einfrequent backwashing\u003c\/strong\u003e , and \u003cstrong\u003elongevity\u003c\/strong\u003e – and are willing to invest in premium Italian quality.\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eDepth filtration. GRP + Gelcoat. Made in Italy.\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp\u003e\u003ca href=\"#product-atc\"\u003e\u003cstrong\u003e👉 Order high-efficiency filters now\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e ✓ Deep filtration (backwashing every 4 weeks instead of every week)\u003cbr\u003e ✓ Crystal-clear water quality (diamond clarity)\u003cbr\u003e ✓ GRP + Gelcoat (20+ year lifespan)\u003cbr\u003e ✓ Transparent lid (visual inspection without opening)\u003cbr\u003e ✓ 6-way valve (all operating modes)\u003cbr\u003e ✓ 3 sizes (for pools 80-180 m³)\u003cbr\u003e ✓ Made in Italy (professional manufacturing)\u003cbr\u003e ✓ 75% less backwash water (36,000 liters\/year saved)\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eOr would it be better to seek advice first?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003ca rel=\"noopener\" href=\"https:\/\/calendly.com\/jens-ischebeck\/kostenlose-produktberatung-poolstark\" target=\"_blank\"\u003e\u003cstrong\u003e👉 Request a free consultation\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e ✓ Non-binding\u003cbr\u003e ✓ What size pool is right for you?\u003cbr\u003e ✓ Quartz sand or glass filter medium?\u003cbr\u003e ✓ Combination with variable pump?\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eThe filter is running. The pressure gauge reads 0.9 bar. As you can see, no action is required.\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp\u003eThe high-performance filter isn't \"just a filter.\" It's \u003cstrong\u003eyour guarantee of crystal-clear water\u003c\/strong\u003e . Your backwash savings. Your 20-year investment. Fiberglass technology like luxury yachts. Depth filtration like professional systems. \u003cstrong\u003eThe heart and lungs of your pool – consistent, efficient, and absolutely reliable.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eIts crystal-clear water. Its tranquility. Its high-level filter.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eTheir standard filter is a wasteful machine. Backwashing every week wastes 48,000 liters per year. The water is \"okay\" (but not crystal clear). The filter becomes brittle after 5-10 years (requiring replacement). This is wasteful.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e The high-performance filter puts an end to this waste. \u003cstrong\u003eBackwashing every 4 weeks (saving 36,000 liters\/year). Crystal-clear water (diamond quality). 20+ year lifespan (no replacement required).\u003c\/strong\u003e One-time investment. Long-term benefits.\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eGet the high-performance filter now – and experience what Italian engineering can truly do: Depth. Clarity. Durability.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Flotide","offers":[{"title":"Default Title","offer_id":52597852438864,"sku":"05120012","price":2080.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/6546\/1728\/files\/Hochschichtfilter_93106830-f586-4461-869e-947af4ebdd38.jpg?v=1772721611","url":"https:\/\/poolstark.ch\/en\/products\/hochschicht-filter-polyester-gel-beschichtet","provider":"Poolstark.de","version":"1.0","type":"link"}