Paramount 004402388000 Clear O3 Ozone Water Purifying System 004-402-3880-00 New Flow Meter is easy to read and is simple to set for maximum efficiency ClearO3 has the highest concentration of ozone with the least amount of air injected into the system Changing UV bulbs is easy and can be completed in a matter of minutes The cylindrical ozone excitement chamber is designed to maximize ozone production Sealed aluminum construction virtually eliminates ozone leakage