In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 24 X 1 Pound
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Availability:
In Stock.
Arrives
Jun 11 – Jun 15
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Style: Shock
Size: 24 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: 27 Pounds
Item Form: Granular
Product Benefits: Contaminants
UPC:
Brand: In The Swim
Item Weight: 27 Pounds
Item Form: Granular
Product Benefits: Contaminants
UPC: 792439324788
Unit Count: 384 Ounce
Product Dimensions: 11.3 x 11.3 x 10.4 inches
Item Weight: 27 pounds
Manufacturer: Pool Solutions
Item model number: 25266 2X12X1
Is Discontinued By Manufacturer: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jun 11 – Jun 15
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: 12 x 1 Pound
Great price and works great for my pool.
Reviewed in the United States on February 16, 2025 by Amazon Customer
Style: Shock
Size: 12 x 1 Pound
The media could not be loaded. Wow, so simple! I have no previous knowledge of pool chemicals, but I did some brief research, bought some Easytest strips, checked the levels, and ordered the 1lb bags of this In The Swim shock for my pool. I poured it in, spreading it evenly around the pool, I have 2 floating chlorine tablets in my pool as well, flipped on the pool pump, and within 24 hours the algae (green) was gone! To clarify it, I’m still waiting on the sodium bicarbonate, but the shock from In The Swim did exactly what I had hoped for the algae and in a very reasonable time frame. It was simple, small enough that I could just cut it open and pour it in, and all of the bags seemed to be in good condition with nothing spilled into the box.
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Reviewed in the United States on February 7, 2025 by thekuan thekuan
Style: Shock
Size: 25 Pound
Great product.
Reviewed in the United States on March 19, 2025 by pat morin
Style: Shock
Size: 25 Pound
I feel like chlorine isn't the same as when I was a kid. Some chlorine I have bought leaves like a dusty film on the surface of the water and then can settle on some rock features in the water leaving like a 'scum' on the rocks that needs to be scrubbed off. This chlorine doesn't do that so that's why i keep going back to it.
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Reviewed in the United States on January 24, 2025 by John Peterson
Style: Shock
Size: 24 x 1 Pound
In the swim is my good to store for pool and spa chemicals particularly if I'm buying for a season and in bulk. Chemicals do what they should and prices , customer service and delivery speed are all terrific.
Reviewed in the United States on March 8, 2025 by Amazon Customer
Style: Shock
Size: 24 x 1 Pound
As long as you are NOT paying shipping expenses (have Amazon Prime), this is the cheapest way to add chlorine to your pool, AND it adds calcium, AND you are not raising Cyanuric Acid (CYA), which should never exceed "30" for a residential pool. This product WILL also stabilize and raise pH, so you can buy less bicarbonate and reduce pH fluctuation. This product is a NO brainer as the best cheap source of chlorine for ANY pool (unless you do not want to increase water hardness (calcium) ). Stable at a minimum of 65% cholorine for well over 1 year, it does not go bad like liquid chlorine, which loses 1/2% + concentration per month! By the time you buy that liquid chlorine, it has probably already degraded a couple percent. The production date on the liquid chlorine is usually at least 50 days old. Learn to read the production date on liquid chlorine sold at HD or Lowe's and do not buy if it is old. The first digits are the year, the next set of digits is the day of the year. For example, a stamp that begins ...20366 will be December 31, 2020. NEVER toss powdered chemicals into pool unless they are pure chlorine. Powdered chemicals just sink and do who knows what to your pool surface. Always mix first in 5 gal bucket, stir, then add to water. I do this a couple times to fully dissolve the calcium. OF COURSE the water will go cloudy - it is *Calcium* HypoChlorite, but the cloudiness only lasts a short time. Most pools do not have enough calcium hardness - I keep mine well above 400 so I can keep the pH low for better chlorine efficacy. This product also avoids the cost of separately buying a calcium enhancer for the pool. Because it has no stabilizer it will not raise your CYA. Final point : Focus on maintaining LSI. This keeps the water from being corrosive or depositing calcium on the surface. I recommend the free Orenda app. Plus -- unlike liquid chlorine, this does not make the water taste salty, is easy to store, is stable, adds hardness, is cheaper source of Chlorine, does NOT add CYA! Minus -- mixing it up before adding to pool takes a couple minutes you have to be careful to avoid splashing, which will ruin your clothes. You also have to cut the packet with a knife or scissors and avoid spilling any. Highly recommended
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Reviewed in the United States on April 3, 2021 by LJacobs
Style: Shock
Size: 6 X 1 Pound
It does its job! I used 2 packs, three times in one week. Because I had gotten behind on maintenance and there was a lot of mosquito larva on top so I wanted to make sure I killed everything in it before proceeding to my next step. I poured one pack on one side of the pool. And one on the other. Then I swept the bottom of the pool to bring everything up. Cleaned my filter a lot to get the algae out and it helped so much. I will definitely buy another box for upkeep.
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Reviewed in the United States on September 10, 2024 by MLE MLE
Style: Shock
Size: 24 x 1 Pound
My pool was starting to get algae and the algaecide I use requires a certain balance of chlorine PPM, and PH to be effective. I only had one bottle of liquid chlorine so I put that in and two pounds of shock, broadcast by hand. two hours later I added two cups of acid. After two more hours I added the algaecide that uses the chlorine in getting rid of the acid. Next morning, no algae and, as the description of the product mentioned, crystal clear water. As for the shock, it dissolved quickly, and unlike other shocks or powdered chlorine, all of it was dissolved and none of it was floating on the surface.
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Reviewed in the United States on September 4, 2024 by JR 44308