In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 50 Pounds
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Availability:
In Stock.
Arrives
Sunday, Oct 5
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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
Unit Count: 800 Ounce
Product Benefits: Contaminants
Item Form: Granular
Item Weight: 50 Pounds
Brand Name: In The Swim
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Oct 5
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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Top Amazon Reviews
Style: Bag
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
Style: Bag
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: Bucket
Size: 25 Pound
keeps pool clean
Reviewed in the United States on November 12, 2024 by Tawny
Style: Bucket
Size: 25 Pound
Buying in bulk is cheaper than multiple single punches. The container comes with a measured cup.
Reviewed in the United States on April 10, 2024 by K.
Style: Bucket
Size: 25 Pound
This product cures the pink allege I had in my pool. The water is crystal clear and I will always have this product to keep the water healthy.
Reviewed in the United States on October 9, 2024 by Ronald Dodds
Style: Bucket
Size: 25 Pound
WORKED ON MY MESS OF A POOL WITH GREEN WATER
Reviewed in the United States on November 2, 2024 by Amazon Customer
Style: Bucket
Size: 50 Pound
This product is similar to shock sold by the large national chains but it comes at a much better cost.
Reviewed in the United States on November 13, 2024 by J
Style: Bag
Size: 12 x 1 Pound
Easy to use and works as advertised.
Reviewed in the United States on September 29, 2024 by sjwallac