{"title":"Filter Bags","description":"","products":[{"product_id":"red-sea-225-micron-felt-filter-bag","title":"Red Sea 225 Micron Felt Filter Bag","description":"\u003cp\u003eThe Red Sea 225 Micron Felt Filter Bag is a reusable mechanical filter sock designed to trap detritus, uneaten food, and particulate waste before it circulates further in your sump or filtration system. Its felt-wall construction effectively captures particles down to 225 microns while still allowing water flow — making it ideal for day-to-day maintenance, new setups, or after heavy maintenance when particulate load is high. At 26 cm long, it fits standard 4\" (10 cm) filter-sock holders (including Red Sea REEFER and MAX-S sumps). Because it holds debris within the felt wall (not just on the surface), it helps prolong interval between cleaning cycles, improves water clarity, and reduces load on downstream filtration like protein skimmers and chemical media.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52014767145301,"sku":null,"price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/225micronfeltfilterbag.webp?v=1764703587"},{"product_id":"red-sea-225-micron-thin-mesh-filter-bag","title":"Red Sea 225 Micron Thin Mesh Filter Bag","description":"\u003cp\u003eThe Red Sea 225 Micron Thin-Mesh Filter Bag is a reusable mechanical filter sock designed for sumps and external filtration systems. Its monofilament mesh traps larger detritus — like uneaten food, fine debris, and suspended waste — while still allowing water to pass through easily, helping to maintain water clarity and reduce the load on downstream filtration. Measuring about 10 cm in diameter and 26 cm long, it fits standard 4″\/10 cm filter-sock holders (including Red Sea REEFER and MAX-S systems) — making installation simple and universal. Because the thin-mesh bag is easy to rinse and reuse, it’s especially useful after heavy maintenance, during new system cycling, or whenever particulate levels are elevated.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52014769340757,"sku":"FD102","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/225micronthinmeshfilterbag.webp?v=1764703700"},{"product_id":"red-sea-100-micron-felt-fine-polish-filter-bag","title":"Red Sea 100 Micron Felt Fine Polish Filter Bag","description":"\u003cp\u003eThe Red Sea 100 Micron Felt Fine Polish Filter Bag is a high-quality, reusable mechanical filter sock designed to provide ultra-fine filtration in sumps and filter systems. Its dense felt walls trap very small particles, detritus, and suspended waste — polishing already-clear water to a crystal-clear finish. At 26 cm long with a standard 4″\/10 cm ring, it fits both dedicated Red Sea filter sock holders (e.g. REEFER, MAX-S) and any standard 4″ shaft holder. Ideal for mature aquariums with low particulate load or for use as a final polishing stage after coarser filtration, this 100-micron felt bag helps maintain water clarity, reduce organic waste load on downstream filtration (like skimmers or chemical media), and supports a cleaner, healthier aquarium environment.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52014771142997,"sku":null,"price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/100micronfeltfinebag.webp?v=1764703830"},{"product_id":"sera-filter-bag-25x15cm","title":"Sera Filter Bag 25x15cm","description":"\u003cp\u003eThe Sera Filter Bag 25×15 cm is a durable, reusable mesh bag designed to simplify aquarium or pond filtration maintenance. It helps contain loose filter media (such as activated carbon, bio-rings, siporax or filter wool) so that media stay neatly in place and can be removed or replaced quickly — no messy spills or lost granules. Compatible with both freshwater and marine setups, the bag makes cleaning or swapping media simple and fast, and helps ensure effective filtration by keeping media consolidated and evenly exposed to water flow.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52043534106965,"sku":null,"price":3.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/filterbag25x15.webp?v=1765212333"},{"product_id":"sera-filter-bag-40x20cm","title":"Sera Filter Bag 40x20cm","description":"\u003cp\u003eThe Sera Filter Bag 40×20 cm is a robust, reusable mesh bag designed to hold loose filter media — such as activated carbon, bio-rings, filter wool, or ceramic media — securely in your aquarium filter, sump or canister. Its generous size makes it ideal for larger tanks or systems with substantial filtration needs, helping keep media contained and preventing granules or fibers from escaping into the tank. The bag is compatible with both freshwater and marine setups, and makes media changes easier and cleaner by allowing simple removal and replacement without mess or spillage.\u003c\/p\u003e","brand":"Marine Fish Shop Online","offers":[{"title":"Default Title","offer_id":52043546952021,"sku":null,"price":4.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/2278\/0501\/files\/filterbag40x20.webp?v=1765212539"}],"url":"https:\/\/marinefishshop.uk\/collections\/filter-bag.oembed","provider":"Marine Fish Shop Online","version":"1.0","type":"link"}