AquaClear 20-Gallon Foam Inserts,White, 3-Pack, A1390

Foam traps particles and debris for mechanical filtration; tailored fit prevents bypass Provides biological filtration as friendly bacteria grow inside pore structure Replacement media designed to fit the AquaClear 20 filter Suitable for both freshwater and saltwater aquariums up to 20 gallons Includes three AquaClear 20 Foam Filter Inserts