GLB Small 1 Inch Tablets are slow-dissolving 1/2 ounce tablets that provide powerful chlorine sanitation. This product has 89% available stabilized chlorine. They are ideal for use in floaters, feeders and skimmers. These Small 1 Inch Tablets are EPA registered. This product is stabilized against the sun's UV rays which break down chlorine. Stabilized chlorine means less sanitizer consumption.