To Raise pH Level:
When the pH value of the water drops below 7.2, add the following amounts of pH Up while the pump is in operation for each 500 gallons of water.
When the pH is between 6.8 and 7.2, add 2 tbs. of pH Up.
< When the pH is below 6.8, add 4 tbs. of pH Up. Allow 4 to 6 hours for circulation, then retest. Repeat above procedures if pH remains low.
Granular formula raises the pH of spa water. If the pH value is continually low, the water should be tested for total alkalinity. If the total alkalinity is low, it should be corrected by adding Alkalinity Up.