{"product_id":"mountain-tree-spiral-filter-mat","title":"Mountain Tree Spiral Filter Mat – 3D Bio \u0026 Mechanical Media for Koi Pond Filters","description":"\u003cp\u003e\u003cstrong\u003eThe Mountain Tree Spiral Filter Mat is a cut-to-size filter medium for koi pond filter chambers and Bakki showers.\u003c\/strong\u003e Its patented spiral 3D structure catches debris as water passes through and gives beneficial bacteria a place to settle, so one layer contributes to both physical and biological filtration.\u003c\/p\u003e\n\u003cp\u003eThe open, water-permeable build lets water and the oxygen it carries move through the mat instead of around it. That matters because the bacteria that process fish waste need a steady supply of both. It suits koi keepers adding a stage to an existing filter, pond builders fitting out custom chambers, and anyone setting up a Bakki shower.\u003c\/p\u003e\n\u003cp\u003eOn its own, a filter mat does not make a complete filtration system. It works best as one stage alongside proper mechanical pre-filtration, dedicated biological media, adequate circulation and regular maintenance.\u003c\/p\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral 3D structure:\u003c\/strong\u003e spiral and coarse filaments create an open, three-dimensional matrix that gives bacteria more places to colonise than a flat pad.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo jobs in one layer:\u003c\/strong\u003e traps suspended debris while hosting beneficial bacteria, supporting both physical and biological filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps water moving:\u003c\/strong\u003e the water-permeable structure helps carry oxygen and nutrients to the bacteria living inside the mat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced thickness and density:\u003c\/strong\u003e 4 cm thick with moderate density, built to resist rapid clogging while still holding debris.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid hot-melt construction:\u003c\/strong\u003e filaments are fused by hot-melting, giving a firm mat that keeps its shape in use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut to fit:\u003c\/strong\u003e trim it to the exact footprint of your chamber, tray or Bakki shower level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple upkeep:\u003c\/strong\u003e rinse with a low-pressure water nozzle, with no scrubbing or chemical cleaners needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat Is the Mountain Tree Spiral Filter Mat?\u003c\/h2\u003e\n\u003cp\u003eIt is a green, 4 cm thick filter mat made by Mountain Tree, a filtration media manufacturer. Spiral filaments and coarse filaments are hot-melted into a single solid sheet. The manufacturer describes it as a multi-functional medium with both physical and biochemical filtration roles.\u003c\/p\u003e\n\u003ch3\u003eHow the Spiral 3D Structure Supports Filtration\u003c\/h3\u003e\n\u003cp\u003eWater entering the mat has to pass through a tangle of spiral and coarse filaments. Larger suspended particles are caught on the way through, which is the physical part of the job. Because the structure is open rather than tightly packed, water keeps flowing even as the mat collects some debris.\u003c\/p\u003e\n\u003ch3\u003eHow It Supports Beneficial Bacteria\u003c\/h3\u003e\n\u003cp\u003eNitrifying bacteria live on surfaces, not in open water. The spiral filaments create a large, sheltered surface for them to attach to and form a stable colony, supporting step-by-step biological filtration. A new mat needs time to colonise before it contributes meaningful biological capacity.\u003c\/p\u003e\n\u003ch3\u003eWhy Water Permeability Matters\u003c\/h3\u003e\n\u003cp\u003eBeneficial bacteria need a constant flow of oxygenated water and the waste they break down. The mat's moderate thickness and density are designed to let water circulate through it, keeping the colony active. A mat that clogs solid starves its bacteria, which is why permeability matters as much as surface area.\u003c\/p\u003e\n\u003ch3\u003ePhysical vs Biological Filtration: What to Expect\u003c\/h3\u003e\n\u003cp\u003ePhysical (mechanical) filtration removes solid waste. Biological filtration converts dissolved ammonia from fish waste into less harmful compounds. This mat contributes to both, but it is not a replacement for a dedicated mechanical stage such as a settlement chamber, brushes, sieve or drum filter. Heavy solid waste reaching the mat will clog it faster and add maintenance, so place it after your main mechanical stage.\u003c\/p\u003e\n\u003ch3\u003eWhere It Fits in a Koi Pond Filtration System\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBakki showers and trickle towers\u003c\/strong\u003e, placed above biological media to spread incoming water evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-chamber filters\u003c\/strong\u003e, as a cut-to-size layer within biological or polishing chambers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom-built filter chambers\u003c\/strong\u003e where pre-cut media will not fit the footprint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter trays and boxes\u003c\/strong\u003e that take a flat mat layer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho It Is Best Suited For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKoi keepers building or upgrading a Bakki shower.\u003c\/li\u003e\n\u003cli\u003ePond owners adding a biological stage to an existing multi-chamber filter.\u003c\/li\u003e\n\u003cli\u003ePond builders and landscape professionals fitting out custom chambers.\u003c\/li\u003e\n\u003cli\u003eHobbyists replacing worn or collapsed filter pads with a firmer, cut-to-size mat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMountain Tree\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct\u003c\/th\u003e\n\u003ctd\u003eSpiral Filter Mat (Green)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct type\u003c\/th\u003e\n\u003ctd\u003ePond filter mat \/ filter media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFiltration\u003c\/th\u003e\n\u003ctd\u003ePhysical (mechanical) and biological\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eStructure\u003c\/th\u003e\n\u003ctd\u003ePatented spiral 3D structure of spiral and coarse filaments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eHot-melted solid structure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eEco-friendly material (polymer type not specified by manufacturer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eColour\u003c\/th\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eThickness\u003c\/th\u003e\n\u003ctd\u003e4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWeight per piece\u003c\/th\u003e\n\u003ctd\u003e6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSurface area\u003c\/th\u003e\n\u003ctd\u003eNot specified by manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eKeep fully submerged or well covered; protect from direct sunlight and UV light; cut to fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaintenance\u003c\/th\u003e\n\u003ctd\u003eRinse with a low-pressure water nozzle; do not move or clean when water is near 0°C or below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize per piece (L × W × T)\u003c\/th\u003e\n\u003cth\u003eArticle no.\u003c\/th\u003e\n\u003cth\u003eArea per piece\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e33 × 33 × 4 cm\u003c\/td\u003e\n\u003ctd\u003eMTF302\u003c\/td\u003e\n\u003ctd\u003eAbout 0.11 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e200 × 100 × 4 cm\u003c\/td\u003e\n\u003ctd\u003eMTF303\u003c\/td\u003e\n\u003ctd\u003e2 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eManufacturer Carton Information (Trade Reference)\u003c\/h3\u003e\n\u003cp\u003eThese figures describe how Mountain Tree packs bulk cartons for distributors. They are not the retail pack size or a minimum order quantity.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eArticle no.\u003c\/th\u003e\n\u003cth\u003ePieces per carton\u003c\/th\u003e\n\u003cth\u003eCarton dimensions\u003c\/th\u003e\n\u003cth\u003eGross carton weight\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMTF302\u003c\/td\u003e\n\u003ctd\u003e23\u003c\/td\u003e\n\u003ctd\u003e85 × 53 × 49 cm\u003c\/td\u003e\n\u003ctd\u003e9.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMTF303\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e204 × 104 × 21 cm\u003c\/td\u003e\n\u003ctd\u003e28 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhich Size Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eBoth sizes are the same material at the same 4 cm thickness, so they filter the same way. The right choice depends only on the shape of the space you are filling.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e33 × 33 × 4 cm pieces\u003c\/strong\u003e suit smaller Bakki shower levels, filter trays, compact boxes and replacement pads. They often fit with little trimming and are easy to lift out and rinse one at a time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e200 × 100 × 4 cm sheets\u003c\/strong\u003e suit large chambers, multi-chamber builds, long troughs and professional projects. Cut to your exact footprint with fewer joins, then into sections you can lift for cleaning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOne 200 × 100 cm sheet covers about the same area as 18 of the 33 × 33 cm pieces.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eMeasure the internal length and width of each chamber, tray or shower level.\u003c\/li\u003e\n\u003cli\u003eIf the footprint is close to 33 cm square, or a multiple of it, the smaller pieces save cutting.\u003c\/li\u003e\n\u003cli\u003eIf the footprint is large or irregular, the full sheet gives a cleaner fit with fewer gaps for water to bypass.\u003c\/li\u003e\n\u003cli\u003ePlan how you will lift the mat out for cleaning; pieces you can handle easily make maintenance simpler.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eNot sure which size fits?\u003c\/strong\u003e \u003ca href=\"https:\/\/wa.me\/917601067412\/\"\u003eSend us your chamber dimensions on WhatsApp\u003c\/a\u003e and we'll recommend the right format and quantity with the least waste.\u003c\/p\u003e\n\u003ch2\u003eInstallation and Maintenance\u003c\/h2\u003e\n\u003ch3\u003eInstalling the Mat\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasure\u003c\/strong\u003e the internal footprint of the chamber, tray or shower level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut to fit\u003c\/strong\u003e with a sharp utility knife or heavy-duty scissors, leaving no gaps at the edges where water could bypass the mat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition it after mechanical filtration\u003c\/strong\u003e so the heaviest solids are removed before water reaches the mat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep it submerged or well covered\u003c\/strong\u003e during use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShade it\u003c\/strong\u003e from direct sunlight and direct UV light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eUsing It in a Bakki Shower\u003c\/h3\u003e\n\u003cp\u003ePlace the mat \u003cstrong\u003eabove\u003c\/strong\u003e your biological media, such as bacteria house or ceramic\/nitrifying rings. Water landing on the mat spreads out evenly before trickling down, rather than channelling through one spot. Keep the shower covered so the mat is not exposed to direct sun.\u003c\/p\u003e\n\u003ch3\u003eCleaning\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRinse with a \u003cstrong\u003elow-pressure\u003c\/strong\u003e water nozzle when debris starts to slow the flow through the mat.\u003c\/li\u003e\n\u003cli\u003eRinse gently. High-pressure washing strips more of the bacterial colony and is not the manufacturer's recommended method.\u003c\/li\u003e\n\u003cli\u003eWhere practical, rinse in pond water rather than chlorinated tap water to protect the bacteria.\u003c\/li\u003e\n\u003cli\u003eIf you have several mats or layers, clean them on different days so the whole colony is never disturbed at once.\u003c\/li\u003e\n\u003cli\u003eDo not move or clean the mat when the water temperature is close to 0°C or below.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThere is no fixed cleaning schedule. Frequency depends on your fish load, feeding, how well your mechanical stage removes solids, and water conditions. Watch for slowing flow, water pooling on a Bakki shower level, or visible build-up, and clean when you see them.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the Mountain Tree Spiral Filter Mat used for?\u003c\/h3\u003e\n\u003cp\u003eIt is a filter medium for koi pond filters and Bakki showers. Its spiral 3D structure traps suspended debris and gives beneficial bacteria a surface to colonise, so it contributes to both physical and biological filtration. It is cut to fit the chamber, tray or shower level it goes into.\u003c\/p\u003e\n\u003ch3\u003eCan I use it in a koi pond filter?\u003c\/h3\u003e\n\u003cp\u003eYes. It is designed for pond filtration and can be cut to fit multi-chamber filters, custom chambers and filter trays. Place it after your main mechanical stage so it is not overloaded with heavy solids, and make sure it stays submerged or well covered.\u003c\/p\u003e\n\u003ch3\u003eDoes it support biological filtration?\u003c\/h3\u003e\n\u003cp\u003eYes. The spiral and coarse filaments provide surfaces where nitrifying bacteria can settle and grow. Like any biological media, a new mat needs time to build a colony before it adds meaningful capacity. How much it contributes depends on your filter design, flow and fish load.\u003c\/p\u003e\n\u003ch3\u003eCan it also be used for physical filtration?\u003c\/h3\u003e\n\u003cp\u003eYes, it catches suspended debris as water passes through. However, it is not a substitute for a dedicated mechanical stage such as a settlement chamber, brushes, sieve or drum filter. Sending heavy solids straight onto the mat will clog it faster and increase cleaning.\u003c\/p\u003e\n\u003ch3\u003eWhich size should I choose for my filter chamber?\u003c\/h3\u003e\n\u003cp\u003eBoth sizes filter identically. The 33 × 33 cm pieces suit smaller trays and Bakki shower levels; the 200 × 100 cm sheet suits large or irregular chambers where you want fewer joins. Measure your chamber and send us the dimensions if you'd like help choosing.\u003c\/p\u003e\n\u003ch3\u003eCan I cut it to fit my filtration system?\u003c\/h3\u003e\n\u003cp\u003eYes. The mat is designed to be cut to different filter sizes. A sharp utility knife or heavy-duty scissors works well. Cut it to fit snugly so water cannot bypass the mat around the edges.\u003c\/p\u003e\n\u003ch3\u003eCan I use it in a Bakki shower?\u003c\/h3\u003e\n\u003cp\u003eYes. Place it above your biological media, such as bacteria house or ceramic rings. Water landing on the mat spreads evenly before trickling down through the media below. Keep the shower covered so the mat is protected from direct sunlight.\u003c\/p\u003e\n\u003ch3\u003eHow should I clean and maintain it?\u003c\/h3\u003e\n\u003cp\u003eRinse it with a low-pressure water nozzle when debris starts to slow the flow. Gentle rinsing, ideally in pond water, removes solids while leaving much of the bacteria in place. Cleaning frequency depends on your fish load and pre-filtration. Do not move or clean it when water is near 0°C or below.\u003c\/p\u003e\n\u003ch3\u003eDoes the mat need to stay submerged?\u003c\/h3\u003e\n\u003cp\u003eYes. The manufacturer advises keeping it fully submerged or well covered during use, and protected from direct sunlight and UV light. In a Bakki shower, a cover over the shower provides this protection.\u003c\/p\u003e\n\u003ch3\u003eDoes it replace a complete koi pond filtration system?\u003c\/h3\u003e\n\u003cp\u003eNo. It is one component. A healthy koi pond still needs mechanical filtration, adequate biological capacity, good circulation, and usually UV clarification, all sized to your pond volume and fish load. If you're planning or upgrading a system, our team can help you design it.\u003c\/p\u003e\n\u003ch2\u003ePairs Well With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/koi-water.com\/products\/mountain-tree-spiral-lotus-root-bacteria-house-ii\"\u003eMountain Tree Spiral Lotus Root Bacteria House II\u003c\/a\u003e – building a Bakki shower? Lay the spiral mat on top of bacteria house.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/koi-water.com\/products\/blue-mat\"\u003eBlue Japanese Filter Mat\u003c\/a\u003e – compare a denser mat for a different chamber.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePlanning or Upgrading Your Filtration?\u003c\/h2\u003e\n\u003cp\u003eA filter mat performs best inside a system sized to your pond. Designing a new filter or upgrading one that's struggling? \u003ca href=\"https:\/\/koi-water.com\/pages\/plan-my-koi-pond\"\u003eGet your filtration sized\u003c\/a\u003e around your pond volume and koi, or learn more about our \u003ca href=\"https:\/\/koi-water.com\/pages\/koi-pond-filtration\"\u003ekoi pond filtration design\u003c\/a\u003e service.\u003c\/p\u003e","brand":"MOUNTAIN TREE","offers":[{"title":"200x100x4CM","offer_id":67663131443501,"sku":null,"price":23500.0,"currency_code":"INR","in_stock":true},{"title":"100x100x4CM","offer_id":67663131476269,"sku":null,"price":12000.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0904\/0370\/1037\/files\/Mountain_Tree_Spiral_Filter_Mat.png?v=1792360215","url":"https:\/\/koi-water.com\/products\/mountain-tree-spiral-filter-mat","provider":"Koi Water Hyderabad","version":"1.0","type":"link"}