{"product_id":"aquarium-sponge-filter","title":"Aquarium Sponge Filter | Fine Pore","description":"\u003cp style=\"text-align: left;\"\u003eThe weighted base sits flat on the substrate and stays anchored without suction cups that pop off curved glass or fail over time in low water levels. The fine pore foam is sized to match the biological load of each tank range — more foam volume in the larger sizes means more surface area for the beneficial bacteria colony that processes ammonia and nitrite between water changes. A flow tube is included with every size and is matched to that unit's foam volume for proper air-lift circulation. Connect any standard aquarium air pump to get running — air pump is sold separately and not included. Fine pore foam outperforms coarse sponge filters for biological filtration because it produces significantly more surface area per square inch for bacteria to colonize. This matters most in established tanks with a real bioload where water parameters need to stay stable between maintenance sessions. The foam is gentle enough that shrimp, fry, and bettas graze the surface throughout the day without any risk of being pulled into an intake — the primary reason most shrimp and fry keepers switch to sponge filtration in the first place. Use it as the sole filter in tanks within the rated size range or run it alongside a canister or hang-on-back unit as a dedicated biological filtration stage.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; margin-left: 0px; margin-right: auto;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #f0f0f0;\"\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003eTank Range\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd; text-align: left;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSmall\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eUp to 15 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eNano tanks, betta tanks, shrimp colonies, fry grow-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMedium\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eUp to 30 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eCommunity tanks, planted aquariums, breeding setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLarge\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eUp to 55 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLarge community tanks, 40 gallon breeders, high-bioload setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Wild Pet Supply","offers":[{"title":"Small","offer_id":52133077778661,"sku":"SMF-001","price":9.99,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":52133077811429,"sku":"MMF-002","price":12.99,"currency_code":"USD","in_stock":true},{"title":"Large","offer_id":52133077844197,"sku":"LMF-003","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0248\/7572\/8959\/files\/smfilter.jpg?v=1787266944","url":"https:\/\/wildpetsupply.com\/products\/aquarium-sponge-filter","provider":"Wild Pet Supply","version":"1.0","type":"link"}