Fluval® Canister Filter 204-305 Foam Blocks - Replacement Aquarium Filter Media

DescriptionFluval Canister Filer 204-305 Foam Blocks do the important work of mechanical straining of particulate waste within the filter. This prevents waste from prematurely clogging other filter media in the module stack.Features: Provides mechanical straining of particulate waste within the filter Includes: 2-packIntended For: Hagen's Fluval Canister FiltersMaterial: FoamColor: WhiteInstructions: Rinse foam monthly in aged aquarium water and replace when the pore structure begins to break down.