To lower pH level:
1. When the pH value of the water is above 7.8, add 1-1/2 tsp. of pH Down while the pump is in operation for each 500 gallons of water.
2. Allow 4 to 6 hours for distribution then retest pH.
3. If the pH value remains above 7.8, repeat the above dosage until the pH is brought within the ideal range of 7.2 to 7.8.
Lowers the pH of spa water. Allow 4 to 6 hours for distribution before retesting the pH level