| Rena Filstar Ceramic Rings are specially designed for use in all FilStar filters. They have a higher cumulative pore volume per liter than standard biological media used in most canister filters. Their highly porous, hollow design effectively distributes water flow and allows massive colonies of beneficial bacteria to grow on and inside each ring, creating an ideal "biological filter." FilStar Ceramic Rings create the ideal substrate for the growth of nitrifying bacteria that remove toxic ammonia and nitrite from aquarium water. They will not break down in the filter or alter pH or water hardness. |
