ClearBlue Ionizer CBI-350B-25-KIT 25,000 Gallon Mineral Lion Ionizer releases microscopic mineral ions that helps to control the algae and bacteria. This allows you to reduce the chlorine, algaecide and other chemicals by up to 90%. By installing an ionizer every homeowner has the opportunity to half the chlorine content for up to 25,000 gallons of water in each pool.