THE SAFEST, MOST EFFECTIVE WATER PURIFIER AVAILABLE FOR SPAS -Makes water sparkle and keeps it soft, clean and crystal clear -Reduces the amount of Chlorine or Bromine needed -Goodbye irritated eyes and faded swimsuits -Extends life of spa and equipment -Most effective sanitizer known -Ozone often used for purifying municiple water supplies -Generates ozone during filtration with ultraviolet lamp -Reduces need for pH balancing