Commercial-grade liquid pool shock by Champion. 12.5% sodium hypochlorite in 1 – gallon jugs, 4 to a case. Easy-to-use, fast, and effective. Pour directly into your swimming pool in residential aquatic situations or feed via a peristaltic metering pump. Liquid chlorine for pools, spas & more. Available for order and ready to ship today from Leisure Pool & Spa Supply, Inc.