Ultraviolet (UV) light can be used as an alternative sanitizing method to very effectively destroy microorganisms in swimming pool water. Up to 99.9% of the microorganisms can be destroyed, as the pool water passes through the UV unit. This dramatic reduction, in the microbial populations, helps to better maintain proper sanitary pool water conditions: reducing the amount of chemical sanitizer needed to maintain proper, sanitary water quality and keep the underwater surfaces free of bacterial or algal growth. A UV Sanitizer must be used in conjunction with another sanitizing product: chlorine, ionizers or mineral purifiers. In addition, oxidation of waste products must be accomplished with the use of chlorine, ozone, shock or hydrogen peroxide. Most commonly a UV Sanitizer is used with chlorine or bromine and can reduce their usage by a considerable amount. Typically, an Ultraviolet Sanitizer is plumbed inline and operates with the filter pump cycle. Water passing through the cell is efficiently sanitized, as the UV light passes through the microorganism’s cell membrane.
You can add UV Sanitizing and an Ozone Generator, but as two separate units. It will virtually assure you that the return flow will be devoid of living algae and bacteria. However, the pool walls and water can still support algae and bacteria. Keeping a low level of chlorine, about 1 PPM, will prevent growth in the pool and on the walls. The ozonator will carry the burden of oxidizing wastes and very little chlorine will actually be required. The odorous form of chlorine will be destroyed, as the water returns to the pool. There should be little or no sensation of chlorine. The fact that you will be able to maintain this low level of free chlorine, with only minimal amounts of chemicals, will act as conformation that proper conditions exist and that everything is functioning properly.