This all-in-one proprietary 3" tablet sanitizes, prevents algae, staining and scaling while clarifying and softening pool water. Also protects against chlorine loss caused by direct sunlight, so you can swim in a beautiful pool all summer long. Easy all-in-one chlorine tablets in 3 ³ size Sanitizes and prevents algae while clarifying pool water These all-in-one chlorine tablets protect against chlorine loss caused by direct sunlight Compatible with floaters, skimmers and feeders