{"product_id":"aquarium-filter-pad-replacement-sunsun-304ab-404ab-704ab-2-pack","title":"Replacement Filter Pads for SUNSUN 304AB 404AB 704AB – 2-Pack","description":"\n\u003ch2\u003eKeep Your Aquarium Crystal Clear with Replacement Filter Pads\u003c\/h2\u003e\n\u003cp\u003eMaintain a clean, healthy aquatic environment with these \u003cstrong\u003eBlue \u0026amp; White Aquarium Filter Pads\u003c\/strong\u003e, designed as direct replacements for \u003cstrong\u003eSUNSUN GRECH 304AB, 404AB, and 704AB external canister filters\u003c\/strong\u003e. This 2-pack ensures you always have a fresh pad ready so your filtration system keeps running at peak performance.\u003c\/p\u003e\n\n\u003ch3\u003eWhy These Filter Pads?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Fit:\u003c\/strong\u003e Engineered specifically for SUNSUN GRECH 304AB \/ 404AB \/ 704AB external filters — no trimming or guesswork required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Layer Blue \u0026amp; White Media:\u003c\/strong\u003e The blue coarse layer captures large debris and particles, while the white fine layer polishes water for exceptional clarity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMechanical Filtration:\u003c\/strong\u003e Traps fish waste, uneaten food, and suspended solids before they break down and cloud your water.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Pack Value:\u003c\/strong\u003e Includes two pads so you can rotate replacements and keep your filter running without interruption.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% New \u0026amp; Quality Assured:\u003c\/strong\u003e Each pad is brand new and ready to use straight out of the packaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 3 Color\/Size Options:\u003c\/strong\u003e Choose the configuration that best suits your filter setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Filter Models\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSUNSUN \/ GRECH 304AB\u003c\/li\u003e\n  \u003cli\u003eSUNSUN \/ GRECH 404AB\u003c\/li\u003e\n  \u003cli\u003eSUNSUN \/ GRECH 704AB\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eSwitch off and disconnect your external canister filter.\u003c\/li\u003e\n  \u003cli\u003eOpen the filter housing and remove the old, worn filter pad.\u003c\/li\u003e\n  \u003cli\u003eRinse the new pad briefly with aquarium water to remove any loose fibres.\u003c\/li\u003e\n  \u003cli\u003eInsert the new pad into the correct tray — blue (coarse) side first, white (fine) side facing outward.\u003c\/li\u003e\n  \u003cli\u003eReassemble the filter, reconnect, and restart.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eMaintenance Tip\u003c\/h3\u003e\n\u003cp\u003eFor best results, rinse your filter pads in removed aquarium water (not tap water) every 2–4 weeks to preserve beneficial bacteria colonies. Replace pads entirely when they no longer rinse clean or show signs of deterioration.\u003c\/p\u003e\n\n\u003cp\u003eFor more guidance on maintaining a healthy aquarium, visit the \u003ca href=\"https:\/\/www.fws.gov\/program\/aquatic-invasive-species\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Fish \u0026amp; Wildlife Service – Aquatic Health Resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which aquarium filter models are these replacement pads compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: These blue and white filter pads are designed as a direct replacement for \u003cstrong\u003eSUNSUN GRECH 304AB, 404AB, and 704AB external canister filters\u003c\/strong\u003e. They are precision-cut to fit these models without any trimming required.\u003c\/p\u003e\n\u003ch4\u003eQ: What do the blue and white layers in the aquarium filter pad do?\u003c\/h4\u003e\n\u003cp\u003eA: The \u003cstrong\u003eblue coarse layer\u003c\/strong\u003e acts as a pre-filter, trapping larger debris such as fish waste and uneaten food. The \u003cstrong\u003ewhite fine layer\u003c\/strong\u003e provides polishing filtration, capturing finer particles to deliver clear, clean aquarium water.\u003c\/p\u003e\n\u003ch4\u003eQ: How often should I replace aquarium filter pads?\u003c\/h4\u003e\n\u003cp\u003eA: It depends on your tank's bio-load, but most hobbyists rinse their filter pads every 2–4 weeks and replace them entirely every 4–8 weeks, or sooner if the pad is visibly damaged or restricts water flow. Keeping a spare set on hand — like this 2-pack — ensures you're never caught without a fresh replacement.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this listing include 2 pads or just 1?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes a \u003cstrong\u003e2-pack\u003c\/strong\u003e of blue and white filter pads, giving you a backup so you can swap immediately without waiting for a new order.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which aquarium filter models are these replacement pads compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These blue and white filter pads are designed as a direct replacement for SUNSUN GRECH 304AB, 404AB, and 704AB external canister filters. 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