HTH Granulated Chlorine Stabilizer - 4 lb.

HTH Pool Care Chlorine Stabilizer helps protect and extend the life of chlorine in your swimming pool water and ensures healthy swimming. For best results, use HTH 6-way test strips weekly to test, balance and maintain stabilizer levels between 20 and 25 ppm. Protects chlorine against sunlight and helps chlorine last longer. Compatible with all swimming pools. Simply add HTH chlorine stabilizer directly to your skimmer.