In Store Only Reduces pH in spa water. Its fast acting and odorless formula 100% soluble does not influence total dissolved solids like regular granular formulas. Directions for sure: Maintain proper daily levels. If levels are higher, add 60mL of pH- per 1,000L of spa water to decrease pH of 0.4. Spa must be in operation before adding pH-. Wait 15 minutes and retest pH. Repeat operation until recommended levels are reached.
