... ” and makes it safe to swim again. For the control of bacteria and algae in swimming pools. Size:0.5kg (or 1lb ... ),2kg (or 5lb),3kg,4kg (or 10lb),8kg and 10kg of Pillow Bags, Doy Packs,Gusseted Bags.0.5kg (or 1lb ... ), 2kg (or 5lb), 3kg, 4kg (or 10lb), 8kg and 10kg of Pails, Jars, Jugs, Pots, Tubes, Drums and etc.25kg or ...