HTH 42031 1 Chlorinating Tablets Swimming Pool Chlorine, 5 lbsThe HTH 1 Chlorinating tablets keep your pool water clean and clear, killing algae and other bacteria. Designed to dissolve slowly for a steady source of available chlorine for up to one week, with a sun protection formula to lengthen chlorine life. Great for pop-up, in-ground, and above-ground pools, including saltwater systems and vinyl pools. About the Brand: HTH was developed for consumers with economical and powerful products for the toughest jobs. HTH and its sister brands offer everything you need for your pool, from algaecides and deposit control formulas to non-chlorine shock treatments, powerful surface cleaners, and more. If you like HTH, check out some of the other similar brands from our parent company, Sigura, like Applied Biochemists, Leisure Time, GLB, Spa Selections, and PooLife. Sigura has a long heritage of developing innovative water treatment solutions for use in pools, lakes, ponds, hot tubs, and more. At Sigura, we have an unparalleled commitment to delivering superior water treatments that improve the environment and enhance the security, health, and safety of our global communities. With our innovation and simple, intuitive solutions that anticipate needs, Sigura customers feel more secure as they enjoy their pools, spas, ponds, and lakes.