https://www.costco.com/p/-/hth-po...4201000378
$15 OFF
$15 manufacturer's savings is valid 5/11/26 through 7/4/26. While supplies last.
Limit 10 per member.
20 x 1 lb. Shock Bags and 20 6-way Test Strips
Treatment for Weekly Use, Prevents Bacteria and Algae
Use Weekly To Solve 90% of Swimming Pool Water Problems
Cal-hypo Restores Pool Water Clarity to Prevent Over Stabilization or Chlorine Lock
1 lb. Bag Treats up to 13,500 Gallons
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