{"product_id":"fluval-fx-carbon-foam-replacement-filter-pads-2-pack-for-fx4-fx5-fx6-mechanical-activated-carbon","title":"Fluval FX Carbon Foam Replacement Filter Pads — 2-Pack for FX4\/FX5\/FX6, Mechanical + Activated Carbon","description":"\u003cp\u003e\u003cstrong\u003eFluval FX Carbon Foam is a dual-action replacement pad that provides mechanical particle trapping and activated-carbon chemical polishing for Fluval FX4, FX5 and FX6 canister filters.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese carbon-impregnated foam inserts are made to slide into Fluval high-performance canisters, capturing fine debris while adsorbing odors, discoloration and various organic contaminants. Each pack includes two pre-cut pads engineered for freshwater and saltwater aquariums. They’re a straightforward swap-in media option when you want clearer water and reduced tint without changing your filter basket layout.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the carbon foam improve water clarity?\u003c\/h3\u003e\n\u003cp\u003eThe foam combines dense mechanical filtration with activated carbon distributed through the pad. As water flows, microscopic particles and suspended debris are physically trapped in the foam’s structure while carbon adsorbs dissolved compounds that cause tint and odors. Together they cut both visible particulates and chemical discoloration to restore clarity faster than mechanical-only media.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMicro-porous foam captures small suspended solids\u003c\/li\u003e\n  \u003cli\u003eCarbon impregnation adsorbs tannins and organic discoloration\u003c\/li\u003e\n  \u003cli\u003eReduces odor and improves display water appearance\u003c\/li\u003e\n  \u003cli\u003eDesigned for continuous flow through FX4\/FX5\/FX6 canister systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these pads fit my Fluval FX canister and how do I install them?\u003c\/h3\u003e\n\u003cp\u003eThe inserts are die-cut to the correct dimensions for Fluval FX4, FX5 and FX6 filter baskets, so installation is a simple replace-and-reseat process. Turn off and depressurize the canister, remove the filter basket, swap the used pad for a fresh one, then reassemble. No cutting or modification needed—each pad is ready to install straight from the package.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-cut size for FX4, FX5, FX6 baskets\u003c\/li\u003e\n  \u003cli\u003eQuick swap: power down, remove basket, replace pad, reassemble\u003c\/li\u003e\n  \u003cli\u003eNo trimming or adhesive required\u003c\/li\u003e\n  \u003cli\u003eWorks with both freshwater and marine setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often should I replace the Fluval carbon foam?\u003c\/h3\u003e\n\u003cp\u003eReplacement frequency depends on stocking, feeding, and tank conditions; typical intervals range from several weeks to a couple of months in well-maintained tanks. Monitor water clarity and flow rate—when discoloration returns or foams clog and reduce flow, it’s time for a new pad. For heavy bioloads or new systems, check media more frequently until conditions stabilize.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect every 2–4 weeks in moderately stocked tanks\u003c\/li\u003e\n  \u003cli\u003eReplace sooner if flow decreases or discoloration returns\u003c\/li\u003e\n  \u003cli\u003eUse two pads per pack to keep a spare on hand\u003c\/li\u003e\n  \u003cli\u003eSafe for regular scheduled maintenance in both salt and freshwater\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance effects can I expect after using these pads?\u003c\/h3\u003e\n\u003cp\u003eAfter installing fresh carbon foam you should notice reduced tint and fewer floating fines, along with improved overall presentation of the aquarium. Because the product focuses on mechanical and chemical polishing, it won’t replace biological media; maintain your biological filtration separately. Regular use keeps water looking clearer between full media changes and helps extend the lifespan of other downstream filter media.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuicker reduction of tannins and mild discoloration\u003c\/li\u003e\n  \u003cli\u003eCaptures micro debris that can cloud water\u003c\/li\u003e\n  \u003cli\u003eSupports stable display between deeper media maintenance\u003c\/li\u003e\n  \u003cli\u003eNon-biological—retain biological media for nitrification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Aquarists running Fluval FX4, FX5 or FX6 canister filters who want an easy, drop-in solution to trap fine particles and chemically polish aquarium water. It’s suited to hobbyists managing both freshwater and saltwater systems who perform routine maintenance and need reliable, pre-cut replacement pads to maintain visual clarity and reduce odors without reworking their filter setup.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these pads compatible with FX3 or other Fluval models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: These carbon foam pads are specifically cut for FX4, FX5 and FX6. They are not sized for FX3 or non-FX models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use the carbon foam in saltwater aquariums?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The pads are suitable for both freshwater and marine aquariums to help remove odors and discoloration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fluval","offers":[{"title":"Default Title","offer_id":55165273407831,"sku":"B00D6DRUIS","price":31.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/fluval-fx-carbon-foam-front-packaging.jpg?v=1790354814","url":"https:\/\/britishgarage.co.uk\/products\/fluval-fx-carbon-foam-replacement-filter-pads-2-pack-for-fx4-fx5-fx6-mechanical-activated-carbon","provider":"British Garage","version":"1.0","type":"link"}