APi Revive! Start Up is a multipurpose treatment that will help remove phosphates, metals, scale, organic debris, and other contaminants that can cause cloudy water and affect chlorine demand. Use this multi-action product at startup, renovations, refills, spring openings, abandoned pools and severe algae clean ups. Revive! is compatible with all pool chemicals, inclduing chlorine, bromine, biguanide and salt, and it is safe for all surfaces and equipment. This product is effective in chlorine levels up to 25 ppm. Use the Revive! Start Up/Clean Up to ensure that your water is healthy all pool season long.