Hi from London (Ont), I also using only Hydrogen Peroxide and have issues with my numbers going up and down. Is there something anything i cam also add to help work in addition to the peroxide. My water is always clear but I algae build up around jets and intakes. Can you add small amounts of chlorine to help or does that just cause the Peroxide to burn off faster? Or is a non-chlorine shock better?? I also have a UV Light system in my Hot tub.