HTH Ultimate Shock! Water Treatment
HTH® Ultimate Shock! Treatment, 6 bags (1 lb. each), is a highly effective, 7-in-1 multi-purpose shock product that works fast to kill bacteria and algae and restore crystal clarity to pool water within 24 hours. It is convenient, easy to use, and won’t over-stabilize your pool. Finally, it provides Visible Blue Action, so you know it is working!