Aquaclear A1392 30-Gallon Foam Inserts,Black, 3-Pack

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 30 filter Suitable for both freshwater and saltwater aquariums up to 30 gallons Includes three AquaClear 30 Foam Filter Inserts