Post-delivery – What does an Ozone generator do?

Adding Ozone to the spa water after the heater as part of the circulation system is quite normal. The Ozone generator creates very high levels of ozone which in turn oxidises bacteria in the circulation system. If you do not have an Ozone system then you will use more sanitizer like Chlorine. Note UV Ozone system need to have a new bulb every year! CD ozone systems last longer but generally need changing every 5 years or so.