The NEW AquaTech EZ-Change #1 Filter Cartridge is a 3-pack of filter cartridges designed for aquariums with a tank capacity of 15 gallons. The cartridges feature a quiet flow rate and are made by the trusted brand AquaTech. With a maximum head height of a filter cartridge, these cartridges provide efficient filtration for a clean and healthy environment for fish and other aquatic animals. Ideal for pet owners looking to maintain the water quality in their aquariums.