Yes, at first I bought Dr. Katz's cheap ozone generator - but I right away sent that back to get a medical grade one from http://www.promolife.com. I think it makes much more ozone, and I run the gas into my personal steam sauna that I also got from promolife. The medical grade ozonator runs off an oxygen concentrator (also from promolife) instead of running off air, and it has a charcoal filter that keeps the ozone from going out into the air. I read that the smaller the bubbles the better, and the medical grade ozonator makes tiny bubbles compared to the cheap one. I also bought a steam water distiller - you need distilled water for ozone or for the coffee enemas.