In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound
In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound
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In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 PoundSwim Pool Shock 68 Cal Hypo Granular Sanitizer Crystal Clear Water Defends Bacteria Algae Microorganisms 12 X 1 Pound 25235 12X1Swim Pool Shock 68 Cal Hypo Granular Sanitizer Crystal Clear Water Defends Bacteria Algae Microorganisms 50 Pounds 25230Swim Pool Shock 68 Cal Hypo Granular Sanitizer Crystal Clear Water Defends Bacteria Algae Microorganisms 6 X 1 Pound 25234 6X1Swim Pool Shock 68 Cal Hypo Granular Sanitizer Crystal Clear Water Defends Bacteria Algae Microorganisms 24 X 1 Pound 25266 2X12X1Swim Pool Shock 68 Cal Hypo Granular Sanitizer Crystal Clear Water Defends Bacteria Algae Microorganisms 25 Pounds 25237
Size12 x 1 Pound

Key item features

  • Potent Cal-Hypo Sanitizer: Contains 68% Calcium Hypochlorite granular sanitizer with 65% available chlorine. Defends against bacteria, algae, and microorganisms, ensuring crystal-clear water.
  • Versatile Water Use: Suitable for above-ground and in-ground swimming pools, spas, and hot tubs, providing a flexible solution for various aquatic environments.
  • Rapid Shock Treatment: Non-stabilized chlorine shock delivers fast oxidation and a quick boost. Ideal for routine maintenance or spring start-up when quick action is needed.
  • Safe Easy Application: Pre-dissolve or dilute granules before spreading in the pool's deepest part. This application method helps prevent bleaching of liners.
  • Precise Weekly Dosage: Apply 1 pound per 10,000 gallons weekly. Maintains optimal 5-10 ppm chlorine levels for consistent, effective sanitation.
  • Convenient Bulk Package: Supplied in a practical package of twelve 1-pound bags, totaling 12 pounds, for simplified, extended pool maintenance.
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Sold and shipped by In The SwimPro Seller
4.3865067466266865 stars out of 5, based on 3335 seller reviews(4.4)
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4.5 out of 5 stars
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963 ratings791 reviews
How item rating is calculated
  1. 5 stars79% (765)
  2. 4 stars7% (72)
  3. 3 stars4% (40)
  4. 2 stars2% (19)
  5. 1 star7% (67)
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Showing 1-3 of 791 reviews

May 25, 2026
Terri K.
5 out of 5 stars review

Seller Verified Purchase

I had a hard time getting my complete order someone stole my algacide I ordered out of my box they had to send me more they sent my order three different times in stead of all together like I ordered did not let me know they was sending my tablets separate you need to watch the people you are shipping our supplies with

Review from https://intheswim.com
Helpful?2L0OMW0C30RC44441780
Apr 28, 2026
Don A.
5 out of 5 stars review

Seller Verified Purchase

I buy all my chemicals from In The Swim because of all the ones I've used they have been the best at all aspect of keeping my pool clean and looking good all spring ,summer & fall. Best prices and super fast shipping. I won't change to another pool service.

Review from https://intheswim.com
Helpful?2L0OMW0C30RC44441780
Jun 22, 2026
Kathy
Top Reviewer
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Size: 50 lbs
Sold and shipped byIn The Swim
5 out of 5 stars review

Verified Purchase

Works well and delivered to my home

I have bought this the last two summers. It works great and I don't need to go to the store and lug it around. This is delivered to me, and it will last most of the summer.

Helpful?2L0OMW0C30RC44441780