Oxy plus Non-Chlorine Shock is a powerful, new chlorine-free shock, designed to clean your pool and leave your water sparkling clear! Oxy Plus is the most popular non-chlorinated shock, using the power of available oxygen to eliminate contaminants, organic waste, chlorine odor, and prevent algae, all while freeing up the chlorine already in your pool. And the best part of chlorine-free shock, is you can get back in the pool sooner after use when compared to traditional chlorine based shock treatments.