Clearwater 5kg Chlorine GranulesClearwater 5 kg chlorine granules provide simple, daily disinfection for your pool or spa. These rapid dissolve, stabilized granules kill bacteria and harmful organisms, ensuring clean water. They can be directly applied to hot tubs over 20C. Caution: Read all usage and safety information on the packaging. This product is harmful if swallowed, an eye irritant, and may cause respiratory irritation. It is also highly toxic to aquatic life.