Paramount Clear O3 006422001000 2 Lamp Ultra UV2 and Clear O3 System 120V. The Clear O3 water purifying system is the perfect addition to any new or existing pool for the cleanest water possible. Ozone actively breaks down non-living waste products in pool water which can combine with chlorine to form unhealthy by-products that can irritate skin and have been linked to asthma and other ailments.