WendyLou

Hi, I have just bought my first hot tub. My TA and Ph levels are reading fine, however, my MPS was low. I am using Aquablanc, I added the Aquablanc O2 Tablets (in floater) and Aquablanc Combination A liquid but instead of raising the level it is now on 0. Can you tell me what I am doing wrong, please. Many thanks Wendy