AquaClear 30 Activated Carbon Filter Insert improves water clarity for freshwater and marine aquariums. AquaClear 30 Activated Carbon Filter Insert provides superior adsorption qualities which eliminate odors, discoloration and impurities. It is designed to fit the AquaClear 30 Power Filter. Adsorbs odors, discoloration and impurities Designed to fit the AquaClear 30 filter Suitable for aquariums between 10 to 30 gallons 3-pack; Economical way to purchase inserts MODEL NO - A1382