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. Chlorine free pool water shock treatments will provide you with the sanitizing results you need to keep your pool clean and safe for swimming without the negative side effects that commonly occur with chlorine-based shock treatments. By using chlorine free pool shock on a weekly basis, you can prevent algae growth, kill contaminants and keep your pool water sparkling clean.