HUGE SAVINGS ON 3" TABLETS COMPARE TO BIOGUARD, SUN, GUARDEX, AND PACE. Powerful 90% Available Chlorine! Our hottest selling tablet weighs 7 oz. and keeps pool water safe and clean by eliminating dangerous contaminants. Stabilized chlorine is U.V. protected against the sun's harmful rays, and these slow-release tablets require less frequent applications. Each tab is individually wrapped. Convenient for use in floaters, automatic feeders, and skimmers. 99% Trichloro-S-Triazinetrione.