Clorox Pool&Spa All-in-One XtraBlue Chlorinating Granules go the extra mile to help maintain clear, beautiful pool water. These daily-use, quick dissolving pool chlorine granules work fast to keep your water clean from both harmful bacteria and unsightly algae. Maximize your summer fun with the XtraBlue Advantage. These multi-functional granules work as both a sanitizer and shock, helping to improve water quality, without degrading under the sun’s rays. While being tough on different types of algae, it keeps your summer swims safe and clean. Swim on! Granules can be added through skimmer or directly to water to keep your water beautiful. Always apply chemicals per label directions. Circulating pool water when applying chemicals helps disperse chemicals throughout the pool for maximum coverage. Maintaining 1-4 ppm* of Free Chlorine is critical to keeping water clean and suitable for swimming. Make sure to use these chlorine granules with the Clorox Pool app. Test weekly to make sure your pool stays sanitized and swim-ready.