DELZONE Eclipse generators feature automatic operation with no residual chemicals to add like salts or minerals. Our standard in-ground ozone products can also be used on above-ground pools. By using a DELZONE Eclipse (or ZO-900) ozone generator, you can reduce the amount of chlorine or bromine usage from 60-90%. If you want the clearest, safest, most pure water for your above ground pool, the Eclipse line of ozonators are the choice for you. Eliminate puffy red eyes, smelly chlorine, and faded swim wear with pure DEL ozonated water.