Before you spend alot of money on an ozonator check out the website http://www.oxygentherapies.com It is Dr. Kurt Donsbough of CA and they are only $300. There is a video that came with mine and shows how to use it and it comes with the gadgets for ozonating water and body and you don't need to fill oxygen tanks. Before you buy one any place be sure it states that it does not put nitrates or nitrous oxide (or something like that)in the air. This is very toxic and can make you very sick. New technology uses ceramic plates instead of heat or ultra violet lights.