Ozone is one of the things I do since getting thyroid cancer. I got a medical grade ozonator and oxygen concentrator from Longevity Resources - http://www.ozonegenerator.com/.
I've bubbled the ozone through water for 1/2 hour every day for over 3 years. I got the medical grade one so I could also put it in a steam sauna (that I got from promolife.com).
I don't know for sure what it's done for me, but I'll keep doing it - that and Essiac Tea and coffee enemas - to make sure the cancer doesn't come back.