I trying Liquid stabilizer this product ( Amazon.com : Natural Chemistry 7401 1 Gallon Liquid Swimming Pool Stabilizer and Conditioner : Garden & Outdoor ) I buy it at the local pool supply. Putting a gallon in the pool does not seem to raise it much at best it raised it maybe from 30 to 35. (20K pool ) On amazon's reviews some claim it does nothing. I'm starting to wonder if it's any good certainly not cheap. So any thoughts on the liquid stabilizer?