HTH Pool Care Granule Alkalinity Increaser 5 lb

The HTH Alkalinity Up helps balance the total alkalinity in your pool water for healthy swimming. Test your water weekly to make sure pH is between 60 and 120 ppm. If alkalinity in your pool water measures below 60, add HTH alkalinity increaser directly to the surface to increase the alkalinity levels. HTH Alkalinity Up is great for all pool types including vinyl-lined pools and saltwater systems.