HTH Pool Care Chlorine Granules Ultra All-in-one sanitizer and shock treatment -Kills bacteria & algae -Softens and clarifies water -Prevents stains and scale -Fast acting -Cal Hypo for visibly sparkling water -Cal Hypo formula prevents chlorine lock Item No. 22019 Part No. 5921779 22019-A-1020 1/Cs GRANULES CHLORINATING 50 LB