HTH Pool Care Chlorine Shock Granules, Multi Use Pool Shock Treatment, Calcium Hypochlorite Formula, 6 Pack 13.3 oz Each, 52030 Manufacturer G5 Outdoors they offer practical storage options A Ferguson Product Id 7575730 they offer practical storage options for essentials Warm Insulation: Insulated with 60 grams of breathable polyester made from 85% recycled materials to provide lasting warmth without overheating use HTH Pool Care Chlorine Shock as part of a weekly maintenance routine to keep free available chlorine levels between 1 and 4 ppm Supports Weekly Maintenance Routine: Use regularly with HTH 6 Way Test Strips to test and balance pool chemistry twice weekly for consistently crystal clear water