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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Availability:
In Stock.
Arrives
Oct 4 – Oct 6
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Style: Shock
Size: 12 x 1 Pound
Features
- Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool
- Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner
- High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water
- Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed
- Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels
Brand: In The Swim
Item Weight: 13.1 Pounds
Item Form: Granular
Product Benefits: Controls Algae, Maintains Clean Sanitized Water, Kills Bacteria
Unit Count: 192 Ounce
Product Dimensions: 10.8 x 9.9 x 5.3 inches
Item Weight: 13.07 pounds
Manufacturer: In The Swim Discount Pool Supplies
Item model number: 25235 12X1
Is Discontinued By Manufacturer: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 4 – Oct 6
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: Shock
Size: 24 x 1 Pound
Almost did not buy these, but so glad I did easy to fling. The pool using this shock keeps my pool nice and the chemicals perfect. Bought it on sale and so glad that I did
Reviewed in the United States on August 3, 2025 by merritt island
Style: Shock
Size: 6 X 1 Pound
Good value, I don't care about brand names so this worked perfect for shocking our pool this spring. Will buy again.
Reviewed in the United States on July 10, 2025 by M.gale81
Style: Shock
Size: 24 x 1 Pound
The media could not be loaded. Get ready for **a shocking experience**—the clean kind! In this episode, **Papa Knows Stuff** tackles a grimy, dull, and cloudy pool and transforms it into a sparkling blue beauty using a **powerful pool shock treatment**. Watch the full **before and after pool transformation**, with tips, tricks, and satisfying footage that shows the real magic of a well-done pool shock. Whether you're a first-time pool owner or a seasoned backyard pro, this video breaks down everything you need to know about shocking your pool the right way. Papa walks you through the process step-by-step: checking the chlorine levels, balancing the pH, applying the pool shock, and letting it work overnight. The results? **Crystal-clear water that’s ready for summer fun!** 📌 **What You'll Learn & See in This Video:** * Why and when you should **shock your pool** * How to apply granular or liquid pool shock safely * The importance of circulation and timing * Satisfying before and after pool visuals * Tips on preventing algae, cloudiness, and odors * A side-by-side comparison showing real results in under 24 hours ⚠️ **Bonus Safety Tips:** * How to protect yourself when handling pool chemicals * Why shocking at night or in low sunlight makes a difference * How long to wait before swimming after a shock treatment
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Reviewed in the United States on May 9, 2025 by PapaKnowsStuff
Style: Shock
Size: 12 x 1 Pound
We have been using this product for years and our pool is aways crystal clear
Reviewed in the United States on August 2, 2025 by PR
Style: Shock
Size: 24 x 1 Pound
Unfortunately in the swim discontinued there “super shock” which was 73% vs this product at 63% which is comparable to most other brands. This product works well and with chlorine tablets is the only chemicals required to maintain a clean pool. I haven’t found an other shock which provides durability, longevity and value for your money, and does a good job either to prevent or get rid of algae without effecting Ph levels !
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Reviewed in the United States on June 12, 2025 by G crew
Style: Shock
Size: 24 x 1 Pound
Excellent product! It keeps my pool clean and clear.
Reviewed in the United States on July 31, 2025 by Camilla Johnson
Style: Shock
Size: 12 x 1 Pound
Excellent package of individual pool sanitizing requirements. Great quality great price easy to use and my Pool man is very pleased. I highly recommend this product.
Reviewed in the United States on June 12, 2025 by Kat
Style: Shock
Size: 24 x 1 Pound
Great but we couldn't find it for three days. It was left in the garage and we did not know it. Product works great!
Reviewed in the United States on July 17, 2025 by Lisa P. Ellis