Leisure Time Spa Balance Spa Down pH Decreaser (30431A) Always maintain the pH of your spa water between 7.2-7.8. A high pH (above 7.8) can cause scaling and/or cloudy or colored water. Compatible with all sanitizers including bromine, chlorine and biguanide For more than 25 years, Leisure Time has been the premier name in spa water care Adjusts water pH and alkalinity downwards Fast-dissolving granular product