Shocking your pool water is a needed step for proper pool maintenance. Shocks or oxidizers chemically destroy organic contaminants, remove combined chlorine and help restore water clarity. This tried-and-true multi-purpose shock provides oxidation, clarification, buffering and flocculation in one easy-to-use product. It's an excellent choice for all pools, especially above ground models. Restores water sparkle, removes unpleasant odors and produces super clear water. Treat and swim in as soon as 15 min.