The chemists on your Silk Balance team have truly created an outstanding product. It’s totally easy to use, 3-4 oz. once a week and my water chemistry is perfect! Also add one tablespoon chlorine granules a day before the Silk Balance. Wish you made a product for my swimming pool that made upkeep this simple! LOVE the way my skin feels after a long soak….like a baby’s you-know-what! As first time spa owner let me say you’ve made a disciple out of me! Thanks…Mary Allen, Willits, Ca. P.S. Even the new down jacket Santa brought me is the color of Silk Balance….a good omen for sure!