... swim again. For the control of bacteria and algae in swimming pools.Size:0.5kg(or 1lb),1kg(or 2lb),2kg(or ... ,Tubes,Drums and etc. 25kg or 50lb bags mainly for swimming pool water treatmentStorage In airiness and dry place, no mixed ... place. About us Qingdao Hot Chemicals Co., Ltd. specializes in swimming pool and spa chemicals since 2000.We expand and modernize ...