Aquarium Biological Bacteria House Ceramic Rings Filter Media 6 lbs Bagged for Pond Fish Tank Canister Filter

Ready to use media bags, convenient use for all types of filters. Good to use in both fresh and saltwater tank. Hollow shape enhances biological filtration capacity allowing water flow through and less likely to get clogged. Porous ceramic material maintains a healthy and biological balance for your tank. 6 lbs in 6 mesh bags. Size of ceramic ring: 11/16" x 5/8". Size of filter media bag: 8 " x 5.5 ". The zipper of the mesh bag is made of plastic.