100% Pure Chlorine-NO ADDITIVES!! Used in most public pools for over 65 years-now available to you at your home. Most effective algaecide in the world-not available in any store. Portable disbursement method-NO CHEMICALS STORED ON YOUR PREMISES. Chemical levels maintained to assure protection of pool surface, equipment and swimmers. Highest quality chemicals provide a safe and sanitary swimming environment. Highly qualified and licensed staff.