GLB 71244 pH Up 2LB Pool Water Balancer Increases pH Level Swimming Pool Allows raising of pH level as needed Aids in preventing staining, scaling and clouding of pool water When pH Falls Below 7.2:While the pump is in operation distribute pH UP into the deep end of the pool 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