I just started using ozonated olive oil that I ordered from http://www.ozonatedoilonline.com/home.html
- they seem to be a pretty good, they use a high quality olive oil, only problem is shipping is from Canada, so its a bit pricey, but its still cheaper than buying an ozonater. I just ordered a zapper for $40 from this guy who sells them on e-bay, just type in http://www.zapperguy.com
and his stuff will come up. Other people say they are just as good as any others.