HTH Pool Care Chlorine Stabilizer for Swimming Pools, Granules, 4 lbs.

Help protect and extend the life of chlorine in your swimming pool water and ensure healthy swimming. Protects chlorine against sunlight - Helps chlorine last longer - Compatible with all swimming pools Extends chlorine life Helps slow down the effects of direct sunlight on chlorine in swimming pool water Easy application Simply add HTH™ Chlorine Stabilizer directly to your skimmer You're all clear with HTH™ For best results, use HTH™ 6-Way Test Strips weekly to test, balance and maintain stabilizer levels between 20 and 25 ppm.