Quote Originally Posted by bradburyesqu View Post
So the Ozone has nothing to do with the amount of chlorine I need? I know that ozone can't replace chlorine but it was my understanding that it was a much better oxidizer and if you had both you could run your pool at significantly lower chlorine PPM and still be fine, because in standard set ups most of the chlorine went to oxidation. Am I completely confused here?
Yes, confused by deceptive marketing.

Ozone reacts destructively with chlorine -- it is worse than useless, applied to outdoor chlorinated pools without special contact chambers and a dechlorination / rechlorination process.