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In The Swim

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 50 Pounds

    • Based on 13,113 reviews
Condition: New
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$283.99 Why this price?
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Availability: Only 8 left in stock, order soon!
Fulfilled by In The Swim Pool Supplies
Arrives Monday, Jun 3
Order within 19 hours and 14 minutes
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Style: Bucket


Size: 50 Pound


Features

  • Powerful chlorine shock treatment that is great for regular maintenance.
  • Quickly eliminates algae, bacteria, and other harmful contaminants from your pool water.
  • Main active ingredient is 68% Calcium Hypochlorite (Cal-Hypo) for quick sanitizing.
  • Dosage: 1 Pound per 10,000 gallons
  • Cal-Chlor granules can be used in swimming pools, spas and hot tubs. Must pre-dissolve/dilute to prevent bleaching of the liner.

Brand: In The Swim


Item Weight: 50 Pounds


Item Form: Granular


Product Benefits: Contaminants


Product Dimensions: 21 x 13 x 13 inches


Item Weight: 50 pounds


Manufacturer: In The Swim


Item model number: 25230


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • No Problems
Style: Bag Size: 12 x 1 Pound
The shock came as ordered and fairly quickly. I never used this brand before, but it seems fine. I did like that I could open the package with my hands and not need a scissor.
Reviewed in the United States on September 2, 2023 by Denis
    • Good Price
Style: Bucket Size: 50 Pound
a Good Price- wish it could have a bit higher % of Hypochloride/65% available chlorine. 70% would be Awesome. But still does a Great Job for the PRICE.
Reviewed in the United States on September 2, 2023 by AP514
    • Great product
Style: Bag Size: 12 x 1 Pound
I have used this product for more than 10 years without incident.
Reviewed in the United States on September 7, 2023 by Sandeye
    • Easier to use
Style: Bucket Size: 25 Pound
We like this not being packaged per each pound. Much easier to scatter in the pool & use what you need & store.
Reviewed in the United States on August 31, 2023 by J Brown
    • Great product
Style: Bag Size: 6 X 1 Pound
I have been using this shock all summer. I just put it in once a week at dusk and it has kept my pool looking great all summer
Reviewed in the United States on August 25, 2023 by Tonya
    • Confusing Instructions
Style: Bag Size: 24 x 1 Pound
This is a very effective pool care product. The thing I would say is that the instructions on this page and the instructions on the package contradict each other. If used as instructed, this product will bleach a vinyl liner on the fist use. The package has a very specific warning of “Do not pre-dissolve this product.” The instructions listed on Amazon by the seller say “pre-dissolve in a clean 5 gallon bucket”. Which is it? I can say that when you pre-desolve, prepare for a chemical reaction in the bucket. If you get any on you, it will burn your skin. It also releases some gas which can be harmful. Again, extremely effective but I now cannot un-I bleach my liner. It’s not the end of the world but it’s definitely noticeable. It definitely does the job but not as clear or easy as others. ... show more
Reviewed in the United States on June 18, 2023 by Andrew Hakala
    • Ph higher
Style: Bag Size: 12 x 1 Pound
Raised ph higher than premium 73 percent
Reviewed in the United States on September 3, 2023 by frank olsen
    • Good value
Style: Bag Size: 24 x 1 Pound
Seems to work as well as more pricey Shock.
Reviewed in the United States on September 1, 2023 by Disappointed

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