Hang on Filter Pro 50 Replacement foam

Replacement Foam
Filter foam for the SuperFish Hang On Pro 50 for optimal mechanical filtration. The foam removes debris from aquarium water and supports a clean and healthy environment for your fish.
Contents: 6 pieces of foam.
Advice: Clean monthly and replace at least once a year, more frequently if necessary. Always replace one sponge at a time to preserve beneficial bacteria.