Inside the ionizing chamber, positively charged ions are detached from stick electrodes, as small invisible particles, and carried away by the water. These get into the pool. The characteristic of POSIDERM is to prevent pathogens and algae from growing in the water. In addition, the POSIDERM bonds with the bacteria and algae in the pool water, to be disposed in the filtering process. The one-of-a-kind UVION control ensures that the correct amount of ions enters the water to prevent the reproduction of pathogens in the water.