Re: ozone therapy & difficulty breathing/finding a low flow pediatric regulator locally.

This is the pediatric regulator that I use. You want CGA540, barb connector, 0-4 LPM:

http://www.cramerdeckermedical.com/product.php?product_id=583



I don't think that drinking ozonated water would cause problems. Unless you are directly breathing medical ozone (which you shouldn't do), ozone therapy should not aggravate breathing issues.