GLB® pH Up increases pH level in swimming pool water.

ACTIVE INGREDIENTS:
Sodium Carbonate………………..100%

DIRECTIONS:
For every 10,000 gallons of water add the following amounts:
1 pound when pH is below 6.6
3/4 pound when pH is between 6.6 and 7.0
1/2 pound when pH is between 7.0 and 7.2
Keeping proper pH levels will help ensure pool sanitizers are working at maximum efficiency and aids in preventing staining, scaling and clouding of pool water.