Powerful Function: Our filter sponge can effectively filter impurities in the water, prevent impurities from entering the filter, extend the service life of the filter, and improve water quality. . High Quality Materials: Our filter foams are made of biochemical sponges, which are not only very safe, no harm to fish, but also very environmentally friendly, and will not cause water pollution. . High Density Design: Our aquarium filter sponge is high density, which can effectively prevent small fine residues from entering the filter, and can also protect small fish and shrimp from being sucked into the filter. . Easy To Use: The appearance of our sponge inlet aquarium is cylindrical design, not only can be easily connected to the filter water inlet, but also very convenient to disassemble for cleaning. . Sustainable Products: We will provide you with 8 pieces of aquarium filter sponges, which can be used repeatedly after cleaning, and the high quality, very durable, can meet your long-term use needs. .