The ClearBlue pool ionizer hooks into your pool filtration system and releases microscopic mineral ions which assist in controlling bacteria and algae in pools and spas by augmenting the bactericidal and algicidal activity of primary disinfectants. This allows you to reduce the chlorine, algaecide and other chemicals. The ClearBlue Ionizer costs less than a salt chlorinator and ClearBlue mineral pools are less effort to maintain than traditional chlorine or salt water pools.