Water is injected with low-dose ozone and mixed thoroughly before being exposed and activated by Ultra Violet (UV-C) light to clean your water. Treats 99.9% of waterborne pathogens. Factory-installed exclusive UV-C technology. Up to 50% reduction in sanitizing chemical usage. Easy care and maintenance with annual bulb replacement. No harmful odors, by-products, chemical creation, or chemical injections are produced. Durable stainless steel and quartz components. Does not cause damage to equipment like salt systems to do. UV-C light has been used for years as a reliable water disinfectant. Used in the following industries, bottling & beverages, food, HVAC systems, industrial & municipal water plants, medical hospitals, ambulances, pharmaceuticals, aquariums, zoos, aquaculture, fish farms, agriculture, cottages & more!