{"product_id":"premium-black-biochemical-sponge-filter-pad-50x50x4cm-cut-to-fit-washable-aquarium-foam-koi-pond-bio-media","title":"Premium Black Biochemical Sponge Filter Pad (50x50x4cm) | Cut-to-Fit Washable Aquarium Foam | Koi Pond Bio-Media","description":"\u003cdiv style=\"background-color: #f8f9fa; padding: 10px; border-left: 4px solid #28a745; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0;\"\u003e\u003cem\u003e🔄 Looking for the perfect housing for this filter pad? Cut it to fit inside our \u003cstrong\u003e\u003ca href=\"https:\/\/atradesen.com\/collections\/aquarium-diy\/products\/premium-drawer-style-aquarium-trickle-filter-box-298x172x95mm-stackable-dry-wet-sump-easy-maintenance-smoked-grey\" style=\"color: #28a745; text-decoration: underline;\"\u003ePremium Drawer-Style Trickle Filter Boxes\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/em\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003ePremium Black Biochemical Sponge Filter Pad (50x50x4cm)\u003c\/h2\u003e\u003cp\u003eUpgrade your aquarium or pond's filtration capacity with our Heavy-Duty Biochemical Sponge Pads from \u003cstrong\u003eAtradesen.com\u003c\/strong\u003e. Measuring a massive 50x50cm with a thick 4cm profile, this highly porous foam is the ultimate media for trapping floating debris while cultivating a massive colony of beneficial nitrifying bacteria to keep your water crystal clear.\u003c\/p\u003e\u003ch3\u003e🌟 Advanced Filtration \u0026amp; Reusability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Action Bio-Media:\u003c\/strong\u003e Effectively traps fish waste and uneaten food (mechanical filtration) while the microscopic pores provide a perfect breeding ground for bacteria that break down toxic ammonia and nitrites (biological filtration).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashable \u0026amp; Never Deforms:\u003c\/strong\u003e Made from premium, high-resilience synthetic foam. It maintains its shape and structural integrity even after months of use and repeated rigorous washings, saving you money on disposable cartridges!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% Custom Cut-to-Fit:\u003c\/strong\u003e Don't be restricted by factory filter sizes! Simply use standard scissors or a utility knife to cut this massive pad to perfectly fit your specific hang-on-back filter, canister, sump, or trickle box.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003e⚠️ Pore Size Selection Guide (Crucial!)\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eChoosing the right pore size is essential to prevent overflows and maintain water clarity. Please read the Atradesen.com guide below:\u003c\/p\u003e\u003cul style=\"background-color: #fff3cd; padding: 15px 15px 15px 35px; border-radius: 5px; color: #856404;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Hole (Coarse):\u003c\/strong\u003e Best for the first stage of filtration or outdoor ponds with heavy bioloads. Allows high water flow and traps large debris like fish poop \u003cb\u003ewithout clogging quickly\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Hole:\u003c\/strong\u003e The perfect balanced sponge for standard indoor aquariums and general mechanical\/biological filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Hole (Fine):\u003c\/strong\u003e Best used as the final \"polishing\" stage in already relatively clean water. Traps the tiniest micro-particles for ultimate clarity, but \u003cb\u003ewill clog very quickly if used as the very first layer in a dirty tank\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Atradesen","offers":[{"title":"Small Hole","offer_id":56349947723942,"sku":"Filter_Material_094","price":8.1,"currency_code":"USD","in_stock":true},{"title":"Medium Hole","offer_id":56349947756710,"sku":"Filter_Material_095","price":8.1,"currency_code":"USD","in_stock":true},{"title":"Large Hole","offer_id":56349947789478,"sku":"Filter_Material_096","price":8.1,"currency_code":"USD","in_stock":true},{"title":"100cmx13.5cmx3cm","offer_id":56349947822246,"sku":"Filter_Material_097","price":3.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/2588\/6118\/files\/Premium_Black_Biochemical_Sponge_Filter_Pad_50x50x4cm_Cut-to-Fit_Washable_Aquarium_Foam_Koi_Pond_Bio-Media-003.png?v=1780663647","url":"https:\/\/atradesen.com\/products\/premium-black-biochemical-sponge-filter-pad-50x50x4cm-cut-to-fit-washable-aquarium-foam-koi-pond-bio-media","provider":"Atradesen","version":"1.0","type":"link"}