Controls all types of pool algae, bacteria, and other disease-causing organisms Long-lasting, slow dissolve pool tabs for even and consistent sanitization Built-in protection against sunlight to shield against chlorine burn off No fillers, glues, or binders for more effective sanitization 99% trichlor active ingredient, 90% available chlorine -- the strongest available Our chlorine tablets are of the highest quality, effectively controlling algae, bacteria, germs, and other microorganisms in your pool. For over 50 years, we have exclusively produced and controlled our unique, highly compressed formula in the United States. This compression ensures a slower, more consistent dissolve rate, providing long-lasting and even sanitization. Stabilized Chlorine Our 3" tabs consist of stabilized chlorine, meaning they are protected from the sun's damaging UV rays. This ensures the chlorine continues to do its job in the water rather than breaking down when exposed to sunlight. Controls Algae, Bacteria and other Germs For cleaner and safer water, each tab contains the highest amount of available chlorine which provides consistent sanitization by controlling algae, bacteria, and other microorganisms. Long-Lasting 3" Tabs We continue to control the entire manufacturing process of our proprietary formula which is densely compressed into our chlorine pucks for a slower, more even dissolve rate. You get superior, long-lasting, and more efficient tabs that provide proper chlorination. Leslie's 3" Jumbo Chlorine Tablet Competitor 3" Jumbo Chlorine Tablet No Fillers, Binders, or Glues Ideal for chlorine floaters and automatic chemical feeders,