{"product_id":"weco-coarse-mesh-zipper-media-bag-4x8","title":"Weco Coarse Mesh Zipper Media Bag (4 x 8 in) | Reusable Filter Bag for Carbon \u0026 Bio Media","description":"\u003cstyle\u003e\n  .aq-pd { font-family: Georgia, serif; color: #1a1a1a; max-width: 860px; margin: 0 auto; line-height: 1.7; }\n  .aq-pd h2 { font-size: 1.45em; font-weight: 700; letter-spacing: -0.01em; border-left: 4px solid #FF5722; padding-left: 12px; margin: 2em 0 0.6em; }\n  .aq-pd p { margin: 0.5em 0 1em; }\n  .aq-callout { background: #1a1a1a; color: #fff; border-radius: 4px; padding: 16px 20px; margin: 1.6em 0; font-family: Arial, sans-serif; font-size: 0.93em; line-height: 1.6; }\n  .aq-callout strong { color: #f5c518; }\n  .aq-features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 1em 0 1.6em; }\n  .aq-feature-card { background: #f4f4f4; border-radius: 4px; padding: 14px 16px; border-left: 3px solid #FF5722; font-family: Arial, sans-serif; font-size: 0.9em; }\n  .aq-feature-card strong { display: block; margin-bottom: 3px; color: #1a1a1a; }\n  .aq-feature-card span { color: #555; }\n  .aq-specs-table { width: 100%; border-collapse: collapse; margin-top: 1em; font-family: Arial, sans-serif; font-size: 0.93em; }\n  .aq-specs-table th { background: #1a1a1a; color: #fff; text-align: left; padding: 9px 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82em; }\n  .aq-specs-table td { padding: 8px 14px; border-bottom: 1px solid #e5e5e5; vertical-align: top; }\n  .aq-specs-table tr:nth-child(even) td { background: #f9f9f9; }\n  .aq-specs-table td:first-child { font-weight: 600; width: 45%; color: #444; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"aq-pd\"\u003e\n\n  \u003cp\u003eThe \u003cstrong\u003eWeco Coarse Mesh Zipper Media Bag\u003c\/strong\u003e is the simple, reusable workhorse for keeping loose filter media exactly where you want it. Drop in your carbon, ceramic rings, bio-balls, or chunky resin, zip it shut, and place it in your sump, canister, or HOB. Coarse weave keeps water flowing fast — built for larger-media types like activated carbon, biological ceramics, and pelletized media. Browse our full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\"\u003efilter media \u0026amp; cartridges\u003c\/a\u003e or shop \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/maintenance-water-care\"\u003emaintenance \u0026amp; water care\u003c\/a\u003e.\u003c\/p\u003e\n\n  \u003cdiv class=\"aq-callout\"\u003e\n    \u003cstrong\u003eZipper closure, not drawstring.\u003c\/strong\u003e The full-length zipper keeps the bag tightly sealed even after dozens of rinses — no slipping knots, no media leaks, no awkward repacking. Just zip and go. \u003cstrong\u003eReusable\u003c\/strong\u003e after every rinse, so one bag handles years of media swaps.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat It's For\u003c\/h2\u003e\n  \u003cp\u003eThis is the bag you reach for when you've got \u003cstrong\u003echunky media\u003c\/strong\u003e — bituminous or pelletized activated carbon, ceramic bio-rings, bio-balls, lava rock, or coarse-grade phosphate resin. The looser weave on the coarse version lets water rip through the media at full flow rate without the back-pressure you'd get from a fine bag. If you're polishing water with GFO, ultra-fine carbon, or Purigen-style resins, grab the \u003cstrong\u003efine mesh\u003c\/strong\u003e version instead — the coarse weave is too open for the smallest media.\u003c\/p\u003e\n\n  \u003ch2\u003eFeatures\u003c\/h2\u003e\n  \u003cdiv class=\"aq-features\"\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eCoarse Nylon Mesh\u003c\/strong\u003e\u003cspan\u003eOpen weave moves water fast — built for chunky media that doesn't pack tight.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eFull-Length Zipper\u003c\/strong\u003e\u003cspan\u003eStays sealed under flow — no drawstring slipping or media leaks.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eReusable\u003c\/strong\u003e\u003cspan\u003eRinse and reuse — one bag handles years of carbon and resin swaps.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003e4 × 8 in Size\u003c\/strong\u003e\u003cspan\u003eFits sumps, canister trays, HOB chambers, and most filter compartments.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eFreshwater \u0026amp; Saltwater\u003c\/strong\u003e\u003cspan\u003eInert nylon is safe for community tanks, planted setups, and reef systems.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e\u003cspan\u003eHeavy-duty mesh holds up to repeated rinsing and saltwater exposure.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eHow to Use\u003c\/h2\u003e\n  \u003cp\u003eFill the bag with your chosen media — typically 1 to 1.5 cups for a 4 × 8 bag depending on media density. Zip it fully closed, rinse the bag under fresh water to flush dust, and place it where water will flow through it: a sump chamber, canister tray, or HOB media basket. Rinse the media monthly to clear gunk, and replace the media (not the bag) per its rated lifespan — typically 4–8 weeks for carbon, longer for biological media.\u003c\/p\u003e\n\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"aq-specs-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWeco\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMesh Type\u003c\/td\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e4 in × 8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eClosure\u003c\/td\u003e\n\u003ctd\u003eZipper\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNylon mesh\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e1 bag\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eReusable\u003c\/td\u003e\n\u003ctd\u003eYes — rinse and reuse\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eFreshwater \u0026amp; saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eActivated carbon, ceramic media, bio-balls, coarse resin\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eWE40408\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eRecommended Media to Pair With\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-matrix-carbon\"\u003eSeachem Matrix Carbon\u003c\/a\u003e — premium activated carbon for freshwater \u0026amp; saltwater\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-spec-carbon-500-ml\"\u003eRed Sea REEF-SPEC Carbon\u003c\/a\u003e — reef-grade carbon for saltwater systems\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-bio-sphere-1kg\"\u003eIceCap Bio-Sphere\u003c\/a\u003e — dense ceramic biological filter media\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/aquaforest-life-bio-media-fresh-1000ml\"\u003eAquaforest Life Bio Media\u003c\/a\u003e — freshwater biological media\u003c\/li\u003e\n    \u003cli\u003eBrowse the full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\"\u003efilter media collection\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eFAQ\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eCoarse or fine — which do I need?\u003c\/strong\u003e\u003cbr\u003eCoarse is for chunky media (carbon pellets, ceramic rings, bio-balls). Fine is for powders and tiny granules (GFO, ultra-fine carbon, Purigen-style resin). When in doubt, hold the media in your hand — if you can see individual chunks, coarse is fine. If it looks like sand or powder, get the fine bag.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eHow long does the bag last?\u003c\/strong\u003e\u003cbr\u003eThe bag itself outlasts the media inside. With monthly rinsing it typically lasts a year or more before the mesh starts to fray. Replace the media on its own schedule and reuse the bag.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eIs the nylon safe for reef tanks?\u003c\/strong\u003e\u003cbr\u003eYes — inert nylon mesh is reef-safe and won't leach anything into the water column. Rinse before first use to clear any manufacturing dust.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWill it fit my filter?\u003c\/strong\u003e\u003cbr\u003eThe 4 × 8 bag fits most sumps, canister media trays, and HOB media chambers. For small canister cartridge slots, measure first — Weco also makes smaller bags.\u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"Weco","offers":[{"title":"Default Title","offer_id":48573380100315,"sku":"WE40408","price":3.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_912d2423-f68c-481d-b1a4-2092a6c372a1.png?v=1775563495","url":"https:\/\/squeakysaquatics.com\/products\/weco-coarse-mesh-zipper-media-bag-4x8","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}