Hot Tub Things Chlorine Granules 2 Pounds - Effective Spa Water Disinfectant The leading hot tub chlorine sanitizer. Say goodbye to bacteria and say hello to clean water! America's #1 Trusted Brand of Hot Tub Chemicals Safety Tested to Assure Quality, Guaranteed Performance Formulated Exclusively for Hot Tubs And Made from the Purest Chemicals Available Compare to Leisure Time Spa 56 Chlorinating Granules