Sponge Filter for Aquarium Super Filter Effect Filtration Cotton Filter Insert Description: Multilayer three-dimensional weaving, mesh fabric and biochemical layer of fibers effectively remove impurities and break down fine particles. The filter insert ma honeycomb shape, which ma strong water permeability and absorbs impurities. Scientifically filter bacterial contaminants, establish a nitrification system and stabilize the cultivation of nitrifying bacteria. Aquarium filter media can be cut to any size, meet all your requirements and save more money. Our aquarium filter media are great for fresh water or aquarium, this aquarium filter can be used as akcesoria for aquarium, pre-filter for wet/dry filters, wastewater tanks, tanks, ponds, fish and vegetable symbiosis systems, etc. Can be reused after cleaning. Specification: Material: cotton Size Chart: 40x50 cm/15,75x19,69 inch 120x30 cm/47,24x11,81 inch Thickness: 2 cm/0.79 inch The package includes: 1 piece. Filter media for aquarium