I don't know much about ozonators, but I would suggest you test a tub with one. When my wife and I were wet testing we tested a tub with the Ace Saltwater System and then got into a tub without the Ace system, but it had an ozonator. We did not know that when we got in, but as soon as I got in I noticed a smell. I asked Eric (TwinCitiesHotSpring on here) what the smell was. He said it was from the ozonator. Don't get me wrong, it wasn't a bad smell but it is a very distinct smell. If you've ever been in a welding shop or a machine shop, bumper cars at an amusement park or anywhere with a lot of electric motors you'll recognize it. To some it may not be a bother, but both my wife and I didn't like it at all.