Experience a revolutionary approach to sanitizing your in-ground or aboveground pool. Nature2 CF uses minerals to destroy bacteria, and delivers the purest, clearest water imaginable. Nature2 CF drops right into your pool cartridge filter, making it easy for you to enjoy the benefits of mineral technology without any installation or special equipment purchases. Nature2 CF works automatically with the pool filtration system and requires no electricity. Its mineral technology reduces chlorine level requirements, improving the look and feel of the pool water.