{"product_id":"seachem-zip-bag","title":"Zip Bag 12.5 x 5.5 in and 19 x 17 in — Zippered Filter Media Bag in Three Meshes - Seachem","description":"\u003cp\u003e The Seachem Medium Zip Bag (12.5\" x 5.5\" \/ 32 x 14 cm) is a medium-mesh (16 mesh) filter bag with a corrosion-resistant zipper, designed to hold medium and large filter media. It easily accommodates 1 liter of media, and its 16 mesh provides an excellent balance between media retention and water flow. Compatible with a wide range of media, including PhosGuard, MatrixCarbon, denitrate, and Matrix. Made of PVC with durable stitched seams, it closes securely without strings or ties.\u003c\/p\u003e\n\n\n\u003ch2\u003e Main advantages\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Dimensions 32 x 14 cm (12.5\" x 5.5\") — easily holds 1 liter of filter media\u003c\/li\u003e\n\n\u003cli\u003e Medium mesh 16 Mesh — excellent balance between media retention and water flow\u003c\/li\u003e\n\n\u003cli\u003e Corrosion-resistant zipper — no strings or ties, quick opening and closing\u003c\/li\u003e\n\n\u003cli\u003e PVC material with durable stitched seams\u003c\/li\u003e\n\n \u003cli\u003eResistant to bleach, caustics and acids\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e Use in reef and marine aquariums\u003c\/h2\u003e\n\n\u003cp\u003e The Medium Zip Bag is the versatile filter bag in the Seachem range, suitable for the widest range of chemical and biological filter media. Its 16-mesh construction retains medium-sized media such as PhosGuard, MatrixCarbon, denitrate, and even Matrix, while offering a higher water flow rate than the Small Zip Bag (25 mesh). Ideal for use in cartridge filters, media chambers, and sumps. For very fine granular media such as PhosNet or PhosBond, the Small Zip Bag (25 mesh) is recommended. For fine resins such as Purigen, use the Seachem The Bag (180 microns).\u003c\/p\u003e\n\n\n\u003ch2\u003e Technical specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Dimensions: 32 x 14 cm (12.5\" x 5.5\")\u003c\/li\u003e\n\n\u003cli\u003e Mesh size: 16 Mesh (medium)\u003c\/li\u003e\n\n\u003cli\u003e Closure: corrosion-resistant zipper\u003c\/li\u003e\n\n\u003cli\u003e Material: PVC\u003c\/li\u003e\n\n\u003cli\u003e Seams: sewn\u003c\/li\u003e\n\n\u003cli\u003e Capacity: 1 liter of media\u003c\/li\u003e\n\n\u003cli\u003e Resistant to: bleach, caustics, acids\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e Media compatibility\u003c\/h2\u003e\n\n\u003cul\u003e\n\n \u003cli\u003eSeachem PhosGuard (aluminum oxide)\u003c\/li\u003e\n\n\u003cli\u003e Seachem MatrixCarbon (spherical activated carbon)\u003c\/li\u003e\n\n\u003cli\u003e Seachem SeaGel\u003c\/li\u003e\n\n\u003cli\u003e Seachem de*nitrate\u003c\/li\u003e\n\n\u003cli\u003e Seachem Renew\u003c\/li\u003e\n\n\u003cli\u003e Seachem Matrix\u003c\/li\u003e\n\n\u003cli\u003e Seachem Zeolite\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e Do not use with fine resins (Purigen, CupriSorb, HyperSorb) — use Seachem The Bag. For very fine granular media (PhosNet, PhosBond), the Small Zip Bag (25 Mesh) is recommended.\u003c\/p\u003e\n\n\n\u003ch2\u003e Comparison of Seachem filter bags\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e The Bag (5\" x 9.5\"): 180-micron superfine mesh, welded seams — ideal for thin resins (Purigen, CupriSorb) and all media\u003c\/li\u003e\n\n\u003cli\u003e Small Zip Bag (12.5\" x 5.5\"): 25 Mesh, stitched seams — ideal for PhosNet, PhosBond, and fine granular media\u003c\/li\u003e\n\n\u003cli\u003e Zip Bag Medium (12.5\" x 5.5\"): 16 Mesh, stitched seams — the most versatile, PhosGuard, MatrixCarbon, denitrate, Matrix\u003c\/li\u003e\n\n\u003cli\u003e Zip Bag Large (19\" x 17\"): 8 Mesh, stitched seams — ideal for bulky Matrix and Pond Matrix bags\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e Instructions for use\u003c\/h2\u003e\n\n \u003cp\u003ePlace the desired filter media in the bag and close it with the corrosion-resistant zipper. Position the bag in the cartridge filter, media chamber, or sump to maximize water flow through the media. Do not overfill—the media should rest loosely enough to allow water to circulate.\u003c\/p\u003e\n\n\n\u003ch2\u003e Why choose the Zip Bag from ReefSolution?\u003c\/h2\u003e\n\n\u003cp\u003e The Medium Zip Bag is the most versatile filter bag in the Seachem range, compatible with the widest range of media. Its corrosion-resistant zipper makes regular media replacement easy. Combine it with Seachem MatrixCarbon for chemical filtration, Seachem PhosGuard for phosphates, or Seachem de*nitrate for denitrification.\u003c\/p\u003e\n\n\n\u003ch2\u003e Frequently Asked Questions\u003c\/h2\u003e\n\n\n\u003ch3\u003e What is the difference between the Medium Zip Bag and the Small Zip Bag?\u003c\/h3\u003e\n\n \u003cp\u003eBoth have the same dimensions (12.5\" x 5.5\") but a different mesh size. The Medium has a 16 Mesh (more open) mesh compatible with a wider range of media, including denitrate and Matrix. The Small has a 25 Mesh (finer) mesh for fine granular media such as PhosNet and PhosBond.\u003c\/p\u003e\n\n\n\u003ch3\u003e Can the Medium Zip Bag contain Purigen or CupriSorb?\u003c\/h3\u003e\n\n\u003cp\u003e No. The 16 Mesh will allow thin resins to pass through. Use the Seachem The Bag with its superfine 180-micron mesh and welded seams for Purigen, CupriSorb, and HyperSorb.\u003c\/p\u003e\n\n\n\u003ch3\u003e Is the Medium Zip Bag the most versatile bag in the range?\u003c\/h3\u003e\n\n\u003cp\u003e Yes. Its 16 Mesh is compatible with the widest range of Seachem media, from MatrixCarbon and Matrix to PhosGuard and denitrate. It's the default choice for most chemical and biological filtration applications.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Small 12.5 x 5.5 in (25 mesh)","offer_id":47583879233707,"sku":"41981","price":6.99,"currency_code":"CAD","in_stock":true},{"title":"Medium 12.5 x 5.5 in (16 mesh)","offer_id":38011244314795,"sku":"21114","price":6.99,"currency_code":"CAD","in_stock":true},{"title":"Large 19 x 17 in","offer_id":47583879266475,"sku":"21115","price":15.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/products\/21114_bb0bd90b-0aee-4e15-acfd-838ef156085c.jpg?v=1773623383","url":"https:\/\/reefsolution.com\/en\/products\/seachem-zip-bag","provider":"Reef Solution","version":"1.0","type":"link"}