【Suitable for Many Aquarium Filtration Media】 Mesh hole diameter: approx 1.2mm, suitable for respiratory biological rings, activated carbon, volcanic rocks, coral sands, ceramic rings, pellets, bio-ball, gravel, zeolite, ammonia remover,etc. Not applicable for finer particles.

【Fits into Various Filters】Filter bags are good for various filters including aquarium filters, tank filters, power filters, canister filter system, canister filters, power filters, sumps, wet/dry filters, etc.

【Multiple Sizes Available】We offer multiple sizes to choose from: 3" x 4", 3" x 8", 5.9" x 7.8", 10" x 7", and 12.2" x 15.9".Please select the size that fits your needs most.One package contains 10 bags of the same size.

【Easy to Use】The aquarium filter bags feature a zipper closure at the opening. This design, as opposed to the traditional drawstring design, offers the convenience of easy filter material replacement and prevents any spillage of the filter material.

【Durable and Reusable】Our bags are made of tear-resistant, strong, and durable polyester fiber material. They can be washed and reused multiple times.