GLB Pool and Spa Products 71202 7-1/2-Pound Alkalinity Up Pool Water Balancer Balancer increases the alkalinity of pool water to prevent the pH level from fluctuating Easily maintain the proper alkalinity level of 80-120 ppm Helps maintain proper water balance Usually show the result of a low total alkalinity condition of the pool water Compatible with chlorine, bromine, ozone, salt water pools and biguanide sanitizers