Yes it is safe. Been doing it for 2 years now. You can buy ozonators in quite a few places on the web from $200-$2,000. Get one that has a tube so you can stick it in your ear. If you want the best goto www.plasmafire.com If you want to talk to Dr. Pressman (the ozone king) goto http://health.groups.yahoo.com/group/ozonetherapy/?yguid=132643103 and join the group.