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popularneomatrixviper posted May 12, 2026 03:02 AM
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popularneomatrixviper posted May 12, 2026 03:02 AM

HTH Pool Care Shock Advanced All-in-one $74.99 Free Shipping Costco.com

$75

$90

16% off
Costco Wholesale
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https://www.costco.com/p/-/4201000378

$15 OFF
$15 manufacturer's savings is valid 5/11/26 through 6/7/26. 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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Deal Details
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About the Poster
https://www.costco.com/p/-/4201000378

$15 OFF
$15 manufacturer's savings is valid 5/11/26 through 6/7/26. 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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9 Comments

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Expert
This user is an Expert in Tech & Electronics
May 12, 2026 09:22 AM
19,957 Posts
Joined Sep 2011
bluekiwi
Expert
This user is an Expert in Tech & Electronics
May 12, 2026 09:22 AM
19,957 Posts
meh deal, only 56.4% chlorine

HTH is known for skimping on the chlorine %
May 13, 2026 12:55 PM
119 Posts
Joined Aug 2008
banilla16May 13, 2026 12:55 PM
119 Posts

Our community has rated this post as helpful. If you agree, why not thank banilla16

It's also $10 cheaper in store for $64
1
May 13, 2026 02:02 PM
3 Posts
Joined Dec 2021
TealApple960May 13, 2026 02:02 PM
3 Posts
Quote from bluekiwi :
meh deal, only 56.4% chlorineHTH is known for skimping on the chlorine %
I know next to nothing about the correct pool chemistry. However, this thing worked like magic - half of the recommended dose cleared up my 40k gal green puddle overnight.
1
May 14, 2026 09:33 PM
65 Posts
Joined Aug 2019
HappyRock3843May 14, 2026 09:33 PM
65 Posts
Sam's gives you 24 for $65 right now
May 14, 2026 09:49 PM
948 Posts
Joined Nov 2006
fatwalletuabMay 14, 2026 09:49 PM
948 Posts
Good deal
2
May 15, 2026 08:45 PM
92 Posts
Joined Apr 2018
PowerfulCaption5013May 15, 2026 08:45 PM
92 Posts
Quote from banilla16 :
It's also $10 cheaper in store for $64
Sam's has cyanuric acid in it just an FYI. Costco does not.
May 22, 2026 05:34 PM
33 Posts
Joined Nov 2018
realaceMay 22, 2026 05:34 PM
33 Posts
Quote from PowerfulCaption5013 :
Sam's has cyanuric acid in it just an FYI. Costco does not.
Is cyanuric acid bad for your pool?

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May 22, 2026 05:46 PM
879 Posts
Joined Jul 2011
HipnotiKMay 22, 2026 05:46 PM
879 Posts
Quote from realace :
Is cyanuric acid bad for your pool?
This isn't a simple answer. You can do some research to get a more detailed answer but essentially you want certain levels of CYA in your pool as it helps protect the chlorine from being depleted via the Sun. But if you have too much, then you actually need more chlorine to keep your pool clean. And you can't remove CYA without draining the pool and adding fresh water.
May 22, 2026 05:50 PM
879 Posts
Joined Jul 2011
HipnotiKMay 22, 2026 05:50 PM
879 Posts
Quote from PowerfulCaption5013 :
Sam's has cyanuric acid in it just an FYI. Costco does not.
Where does it say that? I only see it showings 1% of "other" listed

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