Angielynn
Hi Cammay,
I believe that there are two ways to go. There are some inexpensive units that are meant to ozonate water. There's a post a few notches below yours that lists a couple of these units.
Then there are the medical grade ozone machines like the one I have, which I use for ozone insufflation (rectal, vaginal, ears) and for making water. These are much more expensive - over $2000 US dollars, but for me it has been a really great investment. (You can not use the inexpensive ones for insufflation. I believe that they create a by-product which is not safe for insufflation purposes.) I'll post a link to our site where I talk about my experience with ozone. There are also some links to websites that sell ozone machines, as well as some other articles and tips for using the ozone.
Blessings!
Angie
http://www.successfulhealing.com/Oxygen.htm