CDS liquid chlorinator (pool shock) for swimming pool water disinfection provides instant gratification when added to pools and has no wait time to swim. Less expensive to use than granular chlorine. No scaling when compared to granular products that can lead to excessively high calcium/stabilizer levels which can cause scaling. Liquid pool chlorinator is one of the best options to reduce cyanuric acid levels. 1 pallet has 192 gallons/ 48 cases of 4.