Super Porous Ceramic Media 8-1/2 oz

Filter media for mechanical and biological filtrationHighly porous ceramic exposes greater bacteria-colonizing surfaceIdeal for layering in canister filters - no mess media bagMechanical and biological filtration in one porous media. Ceramic cylinders trap debris without obstructing water flow. Their hollow, super porous structure provides superb surface area for bacterial adhesion. For freshwater or marine aquariums. 3/8" x 3/8" cylinders.Approximately four 8-1/2 oz. packages per liter. Approximately two 24 oz. packages per liter.Please click on "More Information" for FAQs regarding biological filter media.