Highest quality granular pool chlorine from world leaders Orica. Bluewater chlorine contains Calcium Hypochlorite. It is over 70% available chlorine, making it one of the most concentrated chlorine products available.
Granular chlorine products need to be dissolved in water and the liquid added to the outside of the pool. Any residue should be discarded. Note that the Bluewater brand contains a very low level of indisolvable solutes (~6%).