Your pool stays clean and clear with HTH® sanitizer products, designed to effectively guard against bacteria, algae and other organisms. We offer two types of chlorine-based sanitizers stabilized and unsterilized. HTH® ultimate 3 in chlorinating tablets keep your pool clean and clear with a 6-in-1 formula that sanitizes pool water and prevents stain and scale. This formula includes built-in algae protection, clarifier and water softener for the ultimate value in DIY pool care. Apply tablets to feeders, floaters or the skimmer basket, adding 1 tablet for every 10,000 gal of pool water. Sun protected for longer chlorine life, HTH® 3 in tablets dissolve slowly and last up to one week. They're great for all pool types including vinyl-lined pools and salt water systems.