Frankly, I think you're wasting your money with a liquid oxygen supplement. Candida is a facultative anaerobe, it can get along in an oxygen atmosphere just fine.
Think, people get candida infections of the skin all the time, there's plenty of oxygen on the surface of your skin. Another thing, exactly how much oxygen from your pricey oxgen supplement gets delived to the small intestine? Not much, if any, I would be willing to bet. I doubt that there is any real Science backing these products up, and I wouldn't spend a nickel on them until I saw some. Yelling at your candida probably has as much, if not more, of an effect.