Pool Mate 1-1304 Stabilized/Concentrated/Chlorinating Granules, 4-Pound Powerful, super-concentrated, residue-free, and fast-dissolving Customers prefer chlorinating granules because it has little to no effect on pH levels Can be used as a routine chlorine sanitizer or as a shock treatment Broadcast 3 oz. of this product per 10,000 gallons pool water every other day or as often as needed to maintain chlorine residual at 2-4 ppm 4 Pounds