The DuoClear 45 Replacement Cartridge is designed for use in both DuoClear salt water chlorinators and Nature2 Fusion systems, offering advanced mineral sanitation for up to 45,000-gallon pools. Its efficient combination of minerals keep your pool water clean and clear while preventing the growth of algae. With easy installation and maintenance, this cartridge is a reliable and cost-effective solution for pool owners looking to maintain healthy and crystal-clear pool water.