hth® ultimate shock treatment, 6 count 1 lb bags
hth® ultimate shock treatment, 6 count 1 lb. bags, 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!
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