Super Shock-It 73

Premium grade, fast-acting, fast-dissolving 73% calcium hypochlorite granules. Shock treatment and super chlorinator for pools. This granular calcium hypochlorite kills bacteria, controls algae, and destroys organic contaminants. Great for all pool surfaces. Kills bacteria, controls algae, and destroys organic contaminants No need to pre-dissolve Restores sparkle and clarity to water Directions for Pool Use: Shock Treatment/ Superchlorination: Adjust pH between 7.2 and 7.4 prior to shocking or superchlorination. Add this product at night or when the pool is not in use. To prevent pool water problems, shock at least once per week during periods of heavy use or when water temperatures are above 80 degrees and once every two weeks in residential pools receiving normal usage. Maintain operation of the pump and filter. Do not enter the pool until the free chlorine residual has dropped to 4.0pp, or less as measured using a suitable test kit. *See product label for instructions