1、Washable: Aquarium filter cotton with hydrophobic performance, and easy to clean, convenient to reuse, environmentally friendly and durable. 2、Impurity Filtration: This aquarium filter cotton pad can effectively filter impurities and pollutants to keep the water clean and transparent. 3、Cuttable: Fish tank filter media can be cut freely, flexible and convenient, suitable for all types of aquariums and fish tanks. 4、Safe Material: Fish tank mesh filter cotton is made of premium plastic fiber material, non toxic and harmless, will not affect the water quality of the fish tank. 5、Flexible Use: Aquarium filter media is flexible in use position to meet your different needs, also can be used as a pre filter for sump, etc.