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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
Purchase options and add-ons
Brand | In The Swim |
Item Weight | 13.07 Pounds |
Item Form | Granular |
Product Benefits | Contaminants |
About this item
- 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.
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In The Swim was founded in 1982 by a husband and wife team. Shipping chlorine from the back of their garage and taking orders on their front porch, they began to have a vision that this could be something big.
40 years later, In The Swim remains one of the country's largest online retailers for pool chemicals, supplies and equipment. Thanks for shopping with us!
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Product Description
In The Swim Calcium Hypochlorite Pool Shock
Swimming pool shock treatments are an essential aspect of spring pool opening, but can also be used to give your pool a quick chlorine boost. Our most popular and versatile pool shock treatment, used to kill algae and bacteria that make pool water cloudy. Use our Pool Shock to kill visible algae blooms and invisible bacteria, which could cause illness to swimmers. Daily chlorination of the pool will kill most pathogenic bacteria, viruses, and microbes.
Choose Your Chemical
Cal-Hypo Pool Shock
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| Di-Zap 3-in-1 Shock | |
Customer Reviews
|
4.6 out of 5 stars
13,616
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4.6 out of 5 stars
18,429
|
4.7 out of 5 stars
2,511
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4.6 out of 5 stars
625
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4.6 out of 5 stars
104
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Purpose
| Chlorinating Water | Sanitizing | Sanitizing | Sanitizing | Sanitizing |
Main Ingredient
| Calcium Hypochlorite | Trichloro | Bromine | Trichlor | Dichlor |
Ingredient %
| 68% | 99% | 61% | 84% | 99% |
Application
| Pre-dissolve | Floating dispenser | Floating dispenser | Floating dispenser | Floating dispenser |
Key Features
| Versatile fact-acting shock | Long lasting defense | Odorless | Multi-Functional | Incl. Algaecide & Stabilizer |
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Product information
Product Dimensions | 10.8 x 9.9 x 5.3 inches |
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Item Weight | 13.07 pounds |
Manufacturer | In The Swim Discount Pool Supplies |
ASIN | B002WKQ3IE |
Item model number | 25235 12X1 |
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #1,182 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #19 in Swimming Pool Chlorine |
Is Discontinued By Manufacturer | No |
Warranty & Support
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Videos
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To Buy, or NOT to Buy??? Chlorine POOL SHOCK (In The Swim)
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Protect your pool with a quality chlorine floater.
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This Item In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | |
Price | -7% $69.99$69.99 List: $74.99 | -6% $187.99$187.99 List: $199.99 | -14% $49.05$49.05 Typical: $56.79 | -5% $115.99$115.99 List: $122.47 | -37% $27.03$27.03 List: $43.00 | -22% $54.67$54.67 List: $69.99 |
Delivery | — | — | Get it as soon as Tuesday, Apr 2 | — | — | — |
Customer Ratings | ||||||
Easy to use | 4.6 | 4.9 | 4.6 | 4.9 | 4.7 | 4.6 |
Value for money | 4.3 | 4.4 | 4.1 | 4.4 | 4.3 | 4.1 |
Maneuverability | 3.7 | 5.0 | — | 5.0 | 4.2 | 4.8 |
Longevity | 4.5 | — | 4.2 | — | — | 4.2 |
Sold By | In The Swim Pool Supplies | In The Swim Pool Supplies | Amazon.com | In The Swim Pool Supplies | Amazon.com | Amazon.com |
form | Granular | — | Powder | — | — | Tablet |
weight | 13.07 pounds | 25.43 pounds | 1 pounds | 12.93 pounds | 13.3 ounces | 12 pounds |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality and value of the pool spa water treatment. For example, they mention it works well, and is easy to use. Some are happy with the chlorine level, dissolves, clarity, and cleanliness. That said, opinions are mixed on the level of chlorine and the product's effectiveness.
AI-generated from the text of customer reviews
Customers like the quality of the pool spa water treatment. They mention it works fantastic, is consistently reliable, and effective. The product is great and competitively priced. It helps to reduce bad bacteria and destroys a variety of disease-causing organisms.
"This chlorine shock works well. It comes in 1lb plastic bags that are easy to handle and will not break open on accident...." Read more
"...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!..." Read more
"Product is great and competitively priced...." Read more
"This is the second time I have purchased this product and it really works! The first time I purchased it my pool was green!..." Read more
Customers are satisfied with the value of the pool spa water treatment. They mention that it is worth every penny, and has saved them money in the long run. They also say that it's the cheapest way to add chlorine to your pool, and that it saves them gas from having to go get it.
"...back to normal, I at first wasn't sure because of the price, its worth every penny and I liked how fast it arrived." Read more
"...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..." Read more
"...] Product is great and competitively priced...." Read more
"...In the long run, it has saved me money...." Read more
Customers find the pool spa water treatment easy to use. They mention it's convenient, simple, and quick to use, with clear instructions. Some say it works better and easier than liquid chlorine, and is a fraction of the price of other brands. Customers also say it'll keep their pool algae-free, and that it'd be easy to walk around the pool and spread the contents.
"...It comes in 1lb plastic bags that are easy to handle and will not break open on accident...." Read more
"...does not make the water taste salty, is easy to store, is stable, adds hardness, is cheaper source of Chlorine, does NOT add CYA!..." Read more
"...Easy to use and sprinkle throughout the pool and spa area...." Read more
"Easy to use, appears to work well. Just ordered a second." Read more
Customers are mixed about the cleanliness of the pool spa water treatment. Some mention that it clears their pool up much better than other brands, while others say that it makes their pool liner extremely slimy.
"...this once a month along with the same brand chlorine tabs and my pool looks great! Easy to use and sprinkle throughout the pool and spa area...." Read more
"...The algae spots were gone and the pool water is clear and looks great...." Read more
"...does when broadcasting in pool and sinks to bottom and needs to be brushed to spread out...." Read more
"...Calcium hypochlorite is one of the best chemical disinfectants for water, better than household bleach by far...." Read more
Customers like the shock. They mention it's a super product, does the job, and comes quickly. Customers also say that it naturally dissolves and hasn't had any issues. They say it'll be perfect for your pool and is a high quality shock treatment for a reasonable price.
"This is great pool shock!" Read more
"...Best prices usually here at Amazon for pool supplies. Very effective shock. Keeps the water crystal clear." Read more
"Perfect shock for the AZ sun… keeps mustard algae away … I use one a week for the summer to keep the chlorine high in the summer sun!!" Read more
"Great shock. Keeps pool sparkling clear. The individual packs are so convenient. No measuring or mess. Will purchase again." Read more
Customers are mixed about the clarity of the pool spa water treatment. Some mention that it makes their pool crystal clear every time, while others say that it made the water cloudy for several days.
"...Very effective shock. Keeps the water crystal clear." Read more
"...OF COURSE the water will go cloudy - it is *Calcium* HypoChlorite, but the cloudiness only lasts a short time...." Read more
"...The algae spots were gone and the pool water is clear and looks great...." Read more
"...It definitely does the job but not as clear or easy as others." Read more
Customers are mixed about the dissolves. Some mention that it dissolves relatively easily, while others say that it takes a while to dissolve. Some say that not all the granules dissolve, and that it never fully dissolves in their salt water pool.
"...It doesn’t dissolve very easily, so I do it in a bucket, then pour any remaining granuals into the skimmer...." Read more
"...Can’t swim in 15 minutes with this product vs AC. ITSwim doesn’t dissolve like AC does when broadcasting in pool and sinks to bottom and needs to..." Read more
"Low cost; dissolves relatively easily..." Read more
"...It never fully dissolved but it was a higher percentage of chlorine than the stuff we get at our local pool store so we thought maybe that’s why...." Read more
Customers are mixed about the chlorine level of the pool spa water treatment. Some mention that it dissolves quickly, brings available chlorine up without any pH increase like liquid chlorine, and that the levels are pretty stable. However, others say that it does not hold the chlorine content for more than 2 days, and the pool was too chlorinated by a lot.
"...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!..." Read more
"...I've tested my water daily for over a month and it show no chlorine even after using 6 pounds a day for 5 days...." Read more
"...the big name store at a fraction of the price and the active ingredients are almost identical" Read more
"...It never fully dissolved but it was a higher percentage of chlorine than the stuff we get at our local pool store so we thought maybe that’s why...." Read more
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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