Open Cell Aquarium Filter Bio Sponge Media, Filter Sponge Medium Coarseness.
Highly porous efficient Open Cell Aquarium Bio Sponge Filter Media is ideal for optimal biological & chemical filtration. Open Cell Design Filter foam is safe for freshwater and saltwater aquariums or ponds. They are created for biological filters and offers a huge surface area for beneficial bacteria to colonize.
Safe Filter Foam for aquariums, ponds, marine tanks or salt water fish tanks. Easy care and maintenance, simply rinse with water when dirty. Recommend to replace every 3 months.