If you do buy Oxypowder , do it before the 16th, they are going up by $3.
Sometimes they send me an e-mail when there is $5 off. I usually publish it on this forum. One person wrote that they made use of it, so I will do it again when I get one. It always hard to know if people make use of it. So I thank the person for letting me know.
Also they give a discount when you buy more than 1 bottle. I started doing that when I knew that I liked it.