Ample Quantity Size: this pack includes 10 durable filter media bags (11.7" X 7.8"), providing sufficient replacements to maintain a clean aquarium; The spacious design accommodates large filter media like bio balls, ceramic rings, and pellet carbon

Sturdy Mesh Material: made from tear-resistant nylon mesh, these bags allow optimal water flow while securely holding filter media; The breathable fabric prevents clogging and ensures efficient filtration

Rust-free Plastic Zipper: equipped with smooth-gliding plastic zippers, these bags avoid rust corrosion, making them safe for both freshwater and saltwater aquariums; The zipper ensures easy refilling and prevents media leakage

Secure Media Containment: the reinforced seams and tight zipper closure keep filter materials securely inside, even in high-flow environments; No spills or debris escape into the tank

Wide Compatibility: fits most filter systems, including canister filters, wet/dry filters, and power filters; Holds bulky media like volcanic rock, zeolite, or gravel without tearing