The easiest way to control pH. Introduces an additional buffering compound, providing a dual buffering system. SpaGuard Perfect Balance replaces the need for regular use of pH increasers, pH decreasers, Total Alkalinity increasers and Calcium Hardness increasers in most spas. Depending on the type of fill water, some initial pH and TA adjustments may be necessary. Do not add perfect balance if pH level is not perfect!! It will lock it in at that incorrect level. Please Note: Also do not to be used on HotSprings Spas and some other spa manufacturers, refer to manufacturers manual.