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frontpagetunabreath posted Jun 18, 2026 09:02 PM
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frontpagetunabreath posted Jun 18, 2026 09:02 PM

Prime Members: 12-Pk 1-Lb HTH Pool Care Shock Advanced Chemical

+ Free S&H

$36

$56

35% off
Amazon
17 Comments
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Deal Details
Amazon has for Prime Members: 12-Pack 1-Pound HTH 52037R Pool Care Shock Advanced Swimming Pool Chemical (Cal Hypo Formula) on sale for $36.16. Shipping is free.

Thanks to Community Member tunabreath for sharing this deal.

Features:
  • Includes 12 convenient 1-pound bags of fast-dissolving pool shock granules.
  • Powerful 4-in-1 multifunctional shock treatment formulated to solve up to 90% of common pool water issues within 24 hours.
  • Utilizes a calcium hypochlorite (Cal Hypo) base that sanitizes and clears cloudy water without adding cyanuric acid (CYA).
  • Prevents overstabilization and chlorine lock to maintain a vibrant, crystal-clear sparkle all season long.
  • Universally compatible with all swimming pool types, including vinyl-lined pools, Gunite pools, and saltwater systems (won't fade liners).
  • Each individual 1-pound bag treats up to 13,500 gallons of swimming pool water.

Editor's Notes

Written by Nate650 | Staff
  • Our research indicates that this deal is $3.84 less (9.6% savings) than the next best available price from a reputable merchant with prices starting from $40 at the time of this post.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by tunabreath
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has for Prime Members: 12-Pack 1-Pound HTH 52037R Pool Care Shock Advanced Swimming Pool Chemical (Cal Hypo Formula) on sale for $36.16. Shipping is free.

Thanks to Community Member tunabreath for sharing this deal.

Features:
  • Includes 12 convenient 1-pound bags of fast-dissolving pool shock granules.
  • Powerful 4-in-1 multifunctional shock treatment formulated to solve up to 90% of common pool water issues within 24 hours.
  • Utilizes a calcium hypochlorite (Cal Hypo) base that sanitizes and clears cloudy water without adding cyanuric acid (CYA).
  • Prevents overstabilization and chlorine lock to maintain a vibrant, crystal-clear sparkle all season long.
  • Universally compatible with all swimming pool types, including vinyl-lined pools, Gunite pools, and saltwater systems (won't fade liners).
  • Each individual 1-pound bag treats up to 13,500 gallons of swimming pool water.

Editor's Notes

Written by Nate650 | Staff
  • Our research indicates that this deal is $3.84 less (9.6% savings) than the next best available price from a reputable merchant with prices starting from $40 at the time of this post.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by tunabreath

Community Voting

Deal Score
+36
Good Deal
Get Deal at Amazon

Price Intelligence

Model: HTH Swimming Pool Advanced Shock - 12 Pack | Granular Cal Hypo Shock | Kills Bacteria & Algae | Restores Crystal Clarity | Compatible with Salt &

Deal History 

Sale Price
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Sort: Lowest to Highest | Last Updated 6/20/2026, 01:43 PM
Sold By Sale Price
Amazon$36.16

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Top Comments

JonBthatsMe
199 Posts
210 Reputation
How many of these would I need for a large out-door reflecting pool, say, 618 meters with a painted blue bottom, that has a really bad algae problem. Asking for a friend.

17 Comments

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Jun 18, 2026 09:53 PM
95 Posts
Joined May 2011
Raiderguy8Jun 18, 2026 09:53 PM
95 Posts
Fantastic deal. I was needing some, too!
Yesterday 01:28 PM
29 Posts
Joined Nov 2010
OmphaloskepticYesterday 01:28 PM
29 Posts
This really is a great deal, especially in-season.
Yesterday 02:38 PM
2,726 Posts
Joined May 2007
eeagleYesterday 02:38 PM
2,726 Posts
good product, finally chlorine is coming down in price. Sadly I just bought the 15 pack a few days ago 6 cents an ounce more.
Today 06:57 PM
3 Posts
Joined Feb 2018
StupidSexyNedToday 06:57 PM
3 Posts
How many of these to clean up a pool roughly 2000 ft long by 175 ft wide? Asking for a friend
13
Pro
Today 07:31 PM
199 Posts
Joined Dec 2016
JonBthatsMe
Pro
Today 07:31 PM
199 Posts

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

How many of these would I need for a large out-door reflecting pool, say, 618 meters with a painted blue bottom, that has a really bad algae problem. Asking for a friend.
1
5
Today 07:32 PM
1,266 Posts
Joined Dec 2007
BlainnToday 07:32 PM
1,266 Posts
Need to repaint it first....

Quote from StupidSexyNed :
How many of these to clean up a pool roughly 2000 ft long by 175 ft wide? Asking for a friend
1
Today 07:52 PM
491 Posts
Joined Nov 2016
razer145Today 07:52 PM
491 Posts
Lower price than the on sale costco price for the same product, definitely a good deal.

S&S is even better at $34.

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Today 07:53 PM
63 Posts
Joined Mar 2017
niphorosToday 07:53 PM
63 Posts
Quote from Blainn :
Need to repaint it first....
What type of paint? I've gotta make sure it won't peel
1
2
Today 08:00 PM
140 Posts
Joined Nov 2013
TheahhmomentToday 08:00 PM
140 Posts
My "friend" has a blue "pool" with peeling problem. Would this work?
Today 08:15 PM
158 Posts
Joined Mar 2013
JamaicanStudToday 08:15 PM
158 Posts
This is a great deal. I paid $50+ at Costco a week ago. Sucks I don't have prime.
Today 08:19 PM
408 Posts
Joined Mar 2009
untimed6399Today 08:19 PM
408 Posts
Chlorine is more expensive than gold
Today 08:30 PM
46 Posts
Joined Jan 2014
ChenC2178Today 08:30 PM
46 Posts
Quote from JonBthatsMe :
How many of these would I need for a large out-door reflecting pool, say, 618 meters with a painted blue bottom, that has a really bad algae problem. Asking for a friend.
Meters, what is that!
Today 08:35 PM
316 Posts
Joined May 2008
BrunoPuntzJonesToday 08:35 PM
316 Posts
This works out to be about the same price as liquid 10% at $4/gal as best I can tell. So good deal with not having to worry about it breaking down like storing liquid.
Today 08:55 PM
447 Posts
Joined Jan 2010
SpazzyyogaToday 08:55 PM
447 Posts
Quote from JamaicanStud :
This is a great deal. I paid $50+ at Costco a week ago. Sucks I don't have prime.
69.99 today at Costco

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Today 09:00 PM
10 Posts
Joined Jan 2026
GreyPen993Today 09:00 PM
10 Posts
Quote from ChenC2178 :
Meters, what is that!
Roughly 3 communist feet. (I hate that I need to say this, but I'm being facetious)
1

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