New Hagen AquaClear for up to 20 gallon aquariums Foam for aquarium filters

4 boxes - 3 foams in each pack = 12 in total Foam sponge for Aquarium. Hagen AquaClear Aquaclear Material Foam Tank volume 5- 20 Gallons Special feature Lightweight Shape Rectangular Specific uses for product Indoor Mechanically filters dirt and debris Tailored fit prevents bypass Suitable for freshwater or marine aquariums Exclusively designed for use in the AquaClear 20 Power Filter New in box