This system continuously injects millions of tiny, highly concentrated ozone bubbles into the water, neutralizing contaminants on contact. The oxidation process occurs in a dedicated 10-foot contact chamber for improved mixing of ozone and minimized off-gassing. Unlike ozone systems that use a UV bulb that needs to be replaced on a regular basis, our system uses a Corona Discharge cell that requires virtually no maintenance. Unlike ozone systems which turn off when you're using the jets, the FreshWater III system is at work 24 hours a day. (Included in HotSpring; Optional for all Limelight & HotSpot models)