This session will cover the history of UV/Ozone in pool water treatment, from the initial use in the hot water industry (spas and hot tubs) to the demand driven by consumer for low chemical pools. Discussion will include pros & cons of chlorine as an oxidizer; the methods of treating water with Ozone, how it kills bacteria and the pros & cons of Ozone; as well as Ultraviolet water treatment and how it sterilizes water. Content will cover UV & Ozone in combination/Advanced Oxidation Process (AOP)