{"product_id":"aquarium-canister-filter-604-4-piece-sponge-cartridge-set-ew-604-hw-604","title":"Aquarium Canister Filter 604 – 4-Piece Sponge \u0026 Cartridge Set","description":"\n\u003ch2\u003eKeep Your Aquarium Crystal Clear with the 604 Pre-Filter Canister Set\u003c\/h2\u003e\n\u003cp\u003eUpgrade your aquarium's filtration system with this comprehensive \u003cstrong\u003e4-Piece Filter Set\u003c\/strong\u003e designed for the EW-604 \/ HW-604 external canister filters. Whether you're maintaining a freshwater community tank or a planted aquascape, this replacement set delivers multi-stage mechanical and biological filtration to keep your water pristine and your fish thriving.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included in the 4-Piece Set\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePre-Filter Sponge\u003c\/strong\u003e – Captures large particles and debris before they reach the main filter media, extending the life of your cartridges.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter Sponge (Fine)\u003c\/strong\u003e – Provides thorough mechanical filtration, trapping fine suspended particles for sparkling water clarity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter Cartridge\u003c\/strong\u003e – Houses activated media for chemical filtration, removing odors and discoloration from aquarium water.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement Canister Basket\/Tray\u003c\/strong\u003e – A durable housing layer to stack and organize your filter media efficiently inside the canister.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompatible Models:\u003c\/strong\u003e Specifically designed for EW-604 and HW-604 external canister filters — no guesswork, guaranteed fit.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMulti-Stage Filtration:\u003c\/strong\u003e Mechanical pre-filtration combined with fine sponge and cartridge filtration for comprehensive water purification.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eEasy to Maintain:\u003c\/strong\u003e Sponges are rinsable and reusable; cartridges are simple to swap out for hassle-free upkeep.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003ePromotes a Healthy Ecosystem:\u003c\/strong\u003e Supports beneficial bacteria colonization on sponge surfaces for stable biological filtration.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Made from high-quality, fish-safe materials that won't leach harmful substances into your tank.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCost-Effective:\u003c\/strong\u003e Buying the full 4-piece set means you always have fresh media on hand for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThis filter set is perfect for hobbyists and experienced aquarists alike who use the HW-604 or EW-604 canister filter series. Keep a spare set on hand so that water changes and filter cleanings are never delayed — consistent filtration is the cornerstone of a healthy aquatic environment.\u003c\/p\u003e\n\n\u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eRinse sponge media in old tank water (never tap water) during water changes to preserve beneficial bacteria.\u003c\/li\u003e\n  \u003cli\u003eReplace cartridge media every 4–6 weeks or when you notice a reduction in water clarity.\u003c\/li\u003e\n  \u003cli\u003eInspect the pre-filter sponge monthly — a clogged pre-filter can reduce flow rate and strain the pump.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-piece-storage-tray-360-degree-refrigerator-storage-rotating-tray-used-for-kitchen-spice-jars-and-sundry-storage-turntable-1\"\u003e360-Degree Rotating Storage Tray – Great for organizing aquarium supplies\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-foldable-food-cover-vegetable-cover-dining-table-cover-vegetable-umbrella-fly-and-dust-cover\"\u003eFoldable Protective Cover – Keep your tank area tidy and dust-free\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.fws.gov\/\" target=\"_blank\" rel=\"noopener\"\u003eU.S. Fish and Wildlife Service\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which canister filter models is this 4-piece set compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This filter set is specifically designed for the EW-604 and HW-604 external canister filter models. Please verify your model number before purchasing to ensure a proper fit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How often should I replace the aquarium filter cartridge in this set?\u003c\/h4\u003e\n\u003cp\u003eA: We recommend replacing the filter cartridge every 4–6 weeks depending on your tank's bioload. The sponge media can be rinsed and reused multiple times before needing replacement.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use these sponges in other canister filter brands?\u003c\/h4\u003e\n\u003cp\u003eA: These sponges and cartridges are engineered specifically for the 604-series canister filters (EW-604 \/ HW-604). While they may physically resemble generic media, compatibility with other brands cannot be guaranteed for an optimal seal and flow rate.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are the materials safe for fish and live plants?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. All materials used in this filter set are fish-safe and free from high-concern chemicals, making them suitable for both fish-only tanks and planted aquariums.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which canister filter models is this 4-piece set compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This filter set is specifically designed for the EW-604 and HW-604 external canister filter models. Please verify your model number before purchasing to ensure a proper fit.\"}}, {\"@type\": \"Question\", \"name\": \"How often should I replace the aquarium filter cartridge in this set?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"We recommend replacing the filter cartridge every 4–6 weeks depending on your tank's bioload. The sponge media can be rinsed and reused multiple times before needing replacement.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use these sponges in other canister filter brands?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These sponges and cartridges are engineered specifically for the 604-series canister filters (EW-604 \/ HW-604). While they may physically resemble generic media, compatibility with other brands cannot be guaranteed for an optimal seal and flow rate.\"}}, {\"@type\": \"Question\", \"name\": \"Are the materials safe for fish and live plants?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. All materials used in this filter set are fish-safe and free from high-concern chemicals, making them suitable for both fish-only tanks and planted aquariums.\"}}]}\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:\/\/pg0se5-51.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/pg0se5-51.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Aquarium Canister Filter 604 – 4-Piece Sponge \u0026 Cartridge Set\", \"item\": \"https:\/\/pg0se5-51.myshopify.com\/products\/aquarium-canister-filter-604-4-piece-sponge-cartridge-set-ew-604-hw-604\"}]}\u003c\/script\u003e","brand":"Babs","offers":[{"title":"EW-602","offer_id":55390727110796,"sku":"14:173#EW-602","price":89.87,"currency_code":"USD","in_stock":true},{"title":"EW-603","offer_id":55390727143564,"sku":"14:366#EW-603","price":119.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/2862\/6316\/files\/Sb49e3429780e41cba677d90a2f5b66a1r_7af90258-0540-476e-b913-167aad17c737.webp?v=1788134520","url":"https:\/\/babcustomersupport.com\/products\/aquarium-canister-filter-604-4-piece-sponge-cartridge-set-ew-604-hw-604","provider":"Babs","version":"1.0","type":"link"}