UNIVERSAL MEDIA BAG - Aquarium mesh filter media bag is ideal for small filter media such as pelletized carbon, granular carbon, zeolite, peat, crushed coral, ammonia remover, and ceramic rings. Especially suitable for activated carbon. CUSTOMIZE YOUR AQUARIUM - Mesh filter media bags work well in freshwater, saltwater, or reef tanks, both small and large. Choose the filter media that best suits your aquarium setup and optimize your filtration system based on your needs. HIGH QUALITY - Made of durable nylon with a plastic zipper that will not rust or release harmful substances. The mesh bags are tear-resistant, safe, washable, and reusable. CULTIVATE ECO WATER ENVIRONMENT - Place the high-flow zipper mesh bags filled with media into flowing water to help create a healthy living environment for fish. Improves water quality and supports beneficial bacteria growth, helping maintain clean and balanced water conditions. SIZE: 15x20cm COLOR: White, Black PACKAGE CONTENTS: 8 x white aquarium filter bag 8 x black aquarium filter bag Note: Only the items listed are included. Light and display differences may cause slight variations in color. Measurement may vary by +/- 1-3cm.