ClearView's Shimmer-N-Shock is a fast-acting shock for super chlorination to control bacteria and algae. Perfect for all pool types, including vinyl and above-ground, as maintenance or shock. Shimmer-N-Shock is pH neutral, will not cloud water, and quick dissolving. Compatible with all treatment systems: chlorine, bromine, copper, silver ionization and chlorine generators. Will not raise chlorine to unacceptable levels.