AquaStar Pool Products SKR101-OZ White FlowStar Skimmer with Ozone Port What makes Ultimate Ozone, ultimate? Unique ozone injection system efficiently disperses ozone without relying on system pressure, drastically reducing energy costs. Delivers up to 1 gram of ozone per hour, 24 grams a day, suitable for treating pools up to 40,000 gallons. Treats the water on the suction sude so that ionized restructured contaminates can be removed by the filter. The Ultimate Ozone is easy to install and maintain.