{"product_id":"fluval-bio-foam-replacement-2-pack","title":"Fluval Bio Foam Replacement (2 pack)","description":"\u003cp\u003e\u003cstrong\u003eFresh bio-foam brings a tired U-Series filter back to full mechanical and biological filtration.\u003c\/strong\u003e Genuine Fluval Bio-Foam pads, sold as a pack of two, sized to the U2, U3 or U4 underwater filter — pick the model printed on your filter housing, not your tank size, since the wrong pack simply won't seat.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Fluval foam\u003c\/strong\u003e — traps suspended debris and hosts the beneficial bacteria that do your biological filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo pads per pack\u003c\/strong\u003e — a full media change for one filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel-specific fit\u003c\/strong\u003e — cut to the exact housing size of the U2, U3 or U4, no trimming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable housing, replaceable foam\u003c\/strong\u003e — only the worn foam needs changing, not the filter body.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e2 pads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia type\u003c\/td\u003e\n\u003ctd\u003eBio-Foam — mechanical and biological foam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eFluval U2, U3 or U4 internal filters (model sold separately by variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich model do I need?\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVariant\u003c\/th\u003e\n\u003cth\u003eGenuine part number\u003c\/th\u003e\n\u003cth\u003eFits filter\u003c\/th\u003e\n\u003cth\u003eFilter suits aquariums up to\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eU2\u003c\/td\u003e\n\u003ctd\u003eA486\u003c\/td\u003e\n\u003ctd\u003eFluval U2 internal filter\u003c\/td\u003e\n\u003ctd\u003e30 US gal \/ 110 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU3\u003c\/td\u003e\n\u003ctd\u003eA487\u003c\/td\u003e\n\u003ctd\u003eFluval U3 internal filter\u003c\/td\u003e\n\u003ctd\u003e40 US gal \/ 150 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU4\u003c\/td\u003e\n\u003ctd\u003eA488\u003c\/td\u003e\n\u003ctd\u003eFluval U4 internal filter\u003c\/td\u003e\n\u003ctd\u003e65 US gal \/ 240 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eCheck the model number moulded into your filter body or printed on the box — U2, U3 and U4 foam is not interchangeable between models.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for the Fluval U2, U3 and U4 underwater filters, freshwater or saltwater.\u003c\/li\u003e\n\u003cli\u003eNot suitable for the smaller U1, or for Fluval's canister (06\/07-series) or Nano filters — those take different foam entirely.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse in removed tank water, never tap water, to protect the bacteria colony, and replace once the foam stays compressed after squeezing or debris no longer rinses free. Stagger the change against any carbon or Bio-Max media in the same housing.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cp\u003eServicing the rest of the filter at the same time? The \u003ca href=\"\/products\/fluval-filter-bracket-for-u2-u3\"\u003eFluval Filter Bracket for U2\/U3\u003c\/a\u003e and \u003ca href=\"\/products\/fluval-u2-internal-filter-impeller-assembly\"\u003eFluval U2 Internal Filter Impeller Assembly\u003c\/a\u003e cover the other parts that wear on the same filter.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eAs a consumable filter media, this pad is a wear item and sits outside Fluval's equipment warranty — your rights under Australian Consumer Law apply regardless. Standard parcel delivery.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow do I know if I have a U2, U3 or U4?\u003c\/h4\u003e\u003cp\u003eThe model is moulded into the filter housing and printed on the original box. It doesn't correspond directly to tank size if you've since changed tanks, so check the filter itself.\u003c\/p\u003e\u003ch4\u003eCan I fit U3 foam into a U2 housing?\u003c\/h4\u003e\u003cp\u003eNo — each model's foam is cut to that housing only and won't seat properly in a different size.\u003c\/p\u003e\u003ch4\u003eHow often should I replace the foam?\u003c\/h4\u003e\u003cp\u003eFluval doesn't publish a fixed interval for this pad — replace it once it stays compressed after squeezing, debris no longer rinses free, or flow through the filter has visibly dropped.\u003c\/p\u003e\u003ch4\u003eWill it work in a saltwater tank?\u003c\/h4\u003e\u003cp\u003eYes — the foam is inert and suits freshwater and saltwater systems equally.\u003c\/p\u003e","brand":"Fluval","offers":[{"title":"U2","offer_id":55242284761379,"sku":"AA2300","price":10.95,"currency_code":"AUD","in_stock":false},{"title":"U3","offer_id":55335441039651,"sku":"AA2301","price":11.95,"currency_code":"AUD","in_stock":true},{"title":"U4","offer_id":55335441072419,"sku":"AA2302","price":13.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/PF132a_11.png?v=1782878882","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/fluval-bio-foam-replacement-2-pack","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}