Aquaclear 20-Gallon Biomax with Aquaclear Activated Carbon Insert 20-Gallon Aquariums 3-Pack

The AquaClear 20 BioMax Filter Insert provides an optimal environment for beneficial bacteria growth. It works to reduce ammonia and nitrite levels in your tank, and it increases biological filtration efficiency by 30 percent. The AquaClear 20 BioMax Filter Insert is made exclusively for the AquaClear 20 Power Filter. AquaClear 20 Activated Carbon Filter Insert improves water clarity for freshwater and marine aquariums. AquaClear 20 Activated Carbon Filter Insert provides superior adsorption qualities which eliminate odors, discoloration and impurities. It is designed to fit the AquaClear 20 Power Filter.