Aquarium Sponge Filter Replacement, Fish Tank Foam Replacement,4 Packs (Middle Up To 20Gal)

Features: Replacement sponge for sponge filter Sponge filter provide both mechanical and bio filtration soft sponge material traps floating debris and wont suck up your fish Easy to set up: simply install the replacement sponges into the arms holding the sponges washable and reusable Package includes: 4 pieces of replacement sponge