Do I have to use chemicals if I purchase an ozone system?

It is a common misconception that ozone systems eliminate the need for chemicals in your water. Ozone generators convert oxygen (O2) to ozone (O3) using a number of different methods. Sanitizers, such as chlorine and bromine, neutralize or kill bacteria in your spa water. Ozone gas kills organic based organisms but is not strong enough to replace the chemicals. It will greatly reduce the amount of chemicals necessary, but these must still work in tandem to achieve clean, safe water. Part of the weekly maintenance on a hot tub is testing the water for chlorine or bromine levels. Chlorine, for instance, has an ideal level between 1-3 parts per millions (ppm). As the chlorine kills bacteria, your chlorine level begins to drop so we need to add more in order to maintain the proper levels. We can avoid adding more sanitizer by using ozone to aid in the elimination of bacteria.