Aquaneat 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 Won’T 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