Use chlorine free pool shock on a weekly basis to prevent algae growth and kill harmful organic contaminants, such as bacteria. Safer than common chlorine-based pool shock, you can swim immediately after use - no more waiting! Non-chlorine Pool Shock is ideal for weekly maintenance treatments. In the Swim's chlorine free pool shock works well with bromine, & burns off dead chlorine cells to increase the amount of free chlorine in your pool water. Provides your pool with more fighting power to kill off contaminants & keep pool water safe & clean. More Details