Well, this is going to sound a little unorthodox but i thought about why do my plants grow better when it rains than when I water them from my tap? You said there is no oxygen in the water so I am putting some peroxide in the water I use to water them with. just experimenting here right now but I don't have cancer and I have recommended it to friends. this is an awesome website. I use peroxide to whiten my teeth. just put it on a piece of cotton and leave it on my teeth for 10 min. works good.