{"product_id":"aquarium-filter-sponge-50x50cm-biochemical-foam-freshwater-marine","title":"Aquarium Biochemical Filter Sponge 50x50cm – 15\/30\/40PPI Foam","description":"\n\u003ch2\u003eAquarium Biochemical Filter Sponge – 50x50x2cm\u003c\/h2\u003e\n\u003cp\u003eKeep your aquarium water crystal clear with this high-quality \u003cstrong\u003ebiochemical filter sponge\u003c\/strong\u003e. Designed for both freshwater and marine fish tanks, this 50x50cm polyether foam sheet delivers outstanding mechanical and biological filtration in one versatile media. Whether you're running an internal or external filter, this sponge effortlessly traps debris while cultivating beneficial nitrifying bacteria to maintain a healthy aquatic environment.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Filtration:\u003c\/strong\u003e Provides excellent biochemical and physical filtration, removing particles while supporting beneficial bacterial colonies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Pore Sizes:\u003c\/strong\u003e Available in 15PPI, 30PPI, or 40PPI — choose the right density for your filtration needs (coarse, medium, or fine).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrimmable to Any Size:\u003c\/strong\u003e Easily cut to fit any filter housing, canister, sump, or pond filter — no wasted material.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReusable \u0026amp; Long-Lasting:\u003c\/strong\u003e Simply rinse and reuse; the durable polyether foam holds its shape wash after wash.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Suitable for freshwater aquariums, marine reef tanks, koi ponds, and internal or external filter systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExcellent Water Permeability:\u003c\/strong\u003e Open-cell structure allows water to flow freely while maximising contact with beneficial bacteria.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolyether Foam\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 x 50 x 2 cm (50cm x 50cm, 20mm thick)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePore Size Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15PPI \/ 30PPI \/ 40PPI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFish tank \u0026amp; pond internal\/external filters\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreshwater \u0026amp; Marine aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Aquarium Filter Sponge Sheet (50x50x2cm) — choose your preferred pore size\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-30-pcs-mesh-zipper-file-bag-waterproof-moisture-proof-zipper-folder-toy-storage-bag-storage-tools-cosmetic-organization-bag\"\u003eMesh Zipper Storage Bags – Waterproof Organisation Solution\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4w-solar-bird-bath-fountain-pump-garden-pond-fish-tank-1\"\u003e1.4W Solar Fountain Pump – Pond, Garden \u0026amp; Fish Tank\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More About Aquarium Filtration\u003c\/h3\u003e\n\u003cp\u003eFor guidance on maintaining a healthy aquatic environment, visit the \u003ca href=\"https:\/\/www.epa.gov\/watersense\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Environmental Protection Agency – WaterSense\u003c\/a\u003e resource for water quality information.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual colour may vary slightly due to monitor brightness and lighting conditions. Please allow minor measurement deviation (±1–2mm) due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What pore size aquarium filter sponge should I choose – 15PPI, 30PPI, or 40PPI?\u003c\/h4\u003e\n\u003cp\u003eA: The pore size determines the type of filtration. \u003cstrong\u003e15PPI\u003c\/strong\u003e (coarse) is ideal for pre-filtration and trapping large debris in ponds or high-flow systems. \u003cstrong\u003e30PPI\u003c\/strong\u003e (medium) is a great all-rounder for most freshwater and marine tanks, supporting both mechanical and biological filtration. \u003cstrong\u003e40PPI\u003c\/strong\u003e (fine) offers superior polishing filtration for crystal-clear water, best used as a final filtration stage. Many aquarists layer two or three densities for optimal results.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I cut this aquarium filter sponge to fit my specific filter?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The 50x50cm sheet is easily trimmed with scissors or a utility knife to fit virtually any filter housing — internal power filters, canister filters, sump chambers, or pond filter boxes. The polyether foam cuts cleanly without fraying.\u003c\/p\u003e\n\u003ch4\u003eQ: How often should I clean and replace this filter sponge?\u003c\/h4\u003e\n\u003cp\u003eA: It is recommended to rinse the sponge in old tank water (not tap water, to preserve beneficial bacteria) every 2–4 weeks depending on your tank's bio-load. With proper care, the sponge can last 1–2 years or more before it needs replacement. Replace when the foam starts to deteriorate or loses its structural integrity.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this filter sponge safe for marine reef tanks?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The polyether material is inert and does not leach harmful chemicals, making it safe for freshwater fish, marine fish, coral, and invertebrates alike.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What pore size aquarium filter sponge should I choose – 15PPI, 30PPI, or 40PPI?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The pore size determines the type of filtration. 15PPI (coarse) is ideal for pre-filtration and trapping large debris in ponds or high-flow systems. 30PPI (medium) is a great all-rounder for most freshwater and marine tanks, supporting both mechanical and biological filtration. 40PPI (fine) offers superior polishing filtration for crystal-clear water, best used as a final filtration stage. 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The polyether material is inert and does not leach harmful chemicals, making it safe for freshwater fish, marine fish, coral, and invertebrates alike.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Outdoor \u0026 Sports\", \"item\": \"https:\/\/oasis-select.com\/collections\/outdoor-sports\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Aquarium Biochemical Filter Sponge 50x50cm – 15\/30\/40PPI Foam\", \"item\": \"https:\/\/oasis-select.com\/products\/aquarium-filter-sponge-50x50cm-biochemical-foam-freshwater-marine\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"PPI 40 Fine \/ China Mainland","offer_id":47746304737385,"sku":"14:175#PPI 40 Fine;200007763:201336100","price":19.01,"currency_code":"USD","in_stock":true},{"title":"PPI 30 Medium \/ China Mainland","offer_id":47746304770153,"sku":"14:193#PPI 30 Medium;200007763:201336100","price":19.01,"currency_code":"USD","in_stock":true},{"title":"PPI 15 Coarse \/ China Mainland","offer_id":47746304802921,"sku":"14:29#PPI 15 Coarse;200007763:201336100","price":19.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S3a23e79909ab4ab8a476417f76576047z.webp?v=1783056026","url":"https:\/\/oasis-select.com\/products\/aquarium-filter-sponge-50x50cm-biochemical-foam-freshwater-marine","provider":"Oasis Select","version":"1.0","type":"link"}