In The Swim Pool Closing Kit - Winterizing Chemicals for Above Ground and In-Ground Pools - Up to 15,000 Gallons
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Purchase options and add-ons
Brand | In The Swim |
Item Weight | 11.2 Pounds |
Item Form | Powder |
Product Benefits | Maintains clean, sanitized water and protects pool surfaces during winter closing, with reliable protection and easy application See more |
UPC | 729756923851 |
About this item
- Convenient: In The Swim's Pool Winterizing and Closing Chemical Kit streamlines pool closing with all necessary chemicals included, saving time and chemical cost.
- Safe and Reliable Protection: Our winter chemical kits provide reliable protection without the risk of compromising other pool winterizing chemicals or causing damage to pool surfaces.
- Versatile for All Pool Sizes: Kits cater to pools of any shape and size. For in-between sizes, opt for the next size up. Multiple kits are available for pools exceeding 35,000 gallons.
- Effective Oil Absorption: In The Swim's Winter Sorb absorbs 40 times its weight in oils, preventing waterline scum. Kits include 1 white or 2 blue sorbs.
- Comprehensive Kit Components: Kit includes 1 Qt. Winterizer, 1 Qt. Winter Stain-Away, 2 Lb. Chlorine Free Pool Shock, 1 Winter Sorb, and 1 Winter Pool Floater.
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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


We Have Your Winter Chemical Needs Covered
![]() In The Swim Closing Kit
Add to Cart
| ![]() Cal-Hypo Pool Shock
Add to Cart
| ![]() Chlorine-Free Pool Shock
Add to Cart
| ![]() Winter Algaecide
Add to Cart
| ![]() Stain Away
Add to Cart
| |
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Customer Reviews
|
4.7 out of 5 stars 16,963
|
4.6 out of 5 stars 14,781
|
4.7 out of 5 stars 3,098
|
4.7 out of 5 stars 736
|
4.2 out of 5 stars 688
|
Price
| $45.99$45.99 | $62.99$62.99 | $71.99$71.99 | $22.99$22.99 | $24.99$24.99 |
Product Size
| For pools up to 15k gallons | 12 x 1 Pound Bag | 12 x 1 Pound Bag | 1 Quart | 1 Quart |
Purpose
| Winter water protection | Chlorinating Water | Sanitizing | Control algae growth | Prevent surface stains |
Main Ingredient
| Kit | Calcium Hypochlorite | Potassium Peroxymonosulfate | Copper Sulphate Pentahydrate | Hydroxyethlidene |
Ingredient %
| Varies by chemical | 68% | 38% | 11.8% | 13% |
Application
| Varies by chemical | Pre-dissolve | Apply directly to water | Apply directly to water | Apply directly to water |
Features
| Streamline pool closing | Versatile, fact-acting shock | Various water-compatible | Designed for cold temperatures | May lighten existing stains |
Product information
Brand | In The Swim |
---|---|
Item Weight | 11.2 Pounds |
Item Form | Powder |
Product Benefits | Maintains clean, sanitized water and protects pool surfaces during winter closing, with reliable protection and easy application |
UPC | 729756923851 |
Number of Items | 1 |
Unit Count | 1 Count |
Product Dimensions | 13.6 x 8.8 x 8.6 inches |
Item Weight | 11.24 pounds |
Manufacturer | ALLCHEM INDUSTRIES, INC. |
ASIN | B002WKKEU2 |
Item model number | KWD150001AE |
Customer Reviews |
4.7 out of 5 stars |
Best Sellers Rank | #15,380 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #20 in Pool Maintenance Kits |
Is Discontinued By Manufacturer | No |
Warranty & Support
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In The Swim Pool Closing Kit - Winterizing Chemicals for Above Ground and In-Ground Pools - Up to 15,000 Gallons
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Videos
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Awesome winterizing pool kit. Crystal clear pool water✅ Jim's Reviews
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The Benefits and Tips of Using the Swim Chemical Kit #AdBluetrend
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Or NO?! In The Swim Pool Closing Kit - Winterizing ChemicalsEric Muathe
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Pool closing kit above ground pool.Willow Cavapoo Adventures
Compare with similar items
This Item In The Swim Pool Closing Kit - Winterizing Chemicals for Above Ground and In-Ground Pools - Up to 15,000 Gallons | Recommendations | |||||
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Price | -10% $45.99$45.99 List: $50.99 | $69.99$69.99 | $31.99$31.99 | $24.99$24.99 | $24.99$24.99 | -33% $19.99$19.99 Typical: $29.99 |
Delivery | Get it as soon as Monday, Apr 14 | Get it as soon as Tuesday, Apr 15 | Get it as soon as Tuesday, Apr 15 | Get it as soon as Tuesday, Apr 15 | Get it as soon as Tuesday, Apr 15 | Get it as soon as Tuesday, Apr 15 |
Customer Ratings | ||||||
Sold By | In The Swim Pool Supplies | MAV Aqua Doc | Poolzilla | Upswing Products LLC | Upswing Products LLC | DG-Direct |
form | Powder | Granular | Granular | Granular | Liquid | Liquid |
Important information
Store the chemicals in a secure location where children or pets cannot access them, as they may be toxic if ingested.
1. Clean the Pool; 2. Balance the Water; 3. Shock the Pool and Add Algaecide; 4. Add an In The Swim Non-Chlorine Winterizing Kit; 5. Lower The Water Level
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 find the pool winterizing kit easy to use with clear instructions, and report that their water remains crystal clear throughout the season. Moreover, the product works better than other kits, includes everything needed, and offers significant time and money savings. Additionally, they appreciate its effectiveness in winterizing and closing pools, and one customer notes it's less toxic than traditional chlorine and copper treatments.
AI-generated from the text of customer reviews
Customers find the pool closing kit easy to use, with clear instructions and simple installation.
"...Saves me a lot of time and money when opening my pool. And very easy to use with step-by-step instructions." Read more
"...to effectively close your pool for the winter, and the instructions are straightforward and easy to follow...." Read more
"...This product has good instructions and a couple of steps rather than just one chemical to dump in...." Read more
"...I will be using it again this coming year. Has simple instructions and everything needed for a successful DIY closing of a 10000+ gallon, inground..." Read more
Customers report that their pools remain crystal clear throughout the winter, with one customer noting that the chemicals effectively maintain water clarity.
"...year when I’m closing my pool when I open in the spring, my water is crystal clear. Saves me a lot of time and money when opening my pool...." Read more
"...winterizing chemicals worked wonders; after using this kit, my pool was crystal clear when I opened it in the spring...." Read more
"...last year and once I added the pool opening chemicals I had a crystal clean pool." Read more
"...When the pool season returns, the water is already prepared for ease of opening for summer...." Read more
Customers find that the pool closing kit works well, particularly when following instructions, and performs better than other kits.
"Good price and works well" Read more
"This is the 2nd year in a row I've gotten this and it's worked great! Uncovered our pool 2024 summer and it was just clear and cleaned as promised!..." Read more
"repeat customer. works like a charm. in the spring its like you never closed the pool at all. super easy to use. very clear instructions" Read more
"...It definitely works. I am using it again this year." Read more
Customers are satisfied with the kit, noting that it contains everything needed for pool maintenance.
"...I love that it includes all the necessary items, from algaecide to winterizing shock, which took the guesswork out of the process...." Read more
"Satisfied with product" Read more
"Nice product, easy to use." Read more
"Good kit. Will know how it worked when I reopen the pool." Read more
Customers find the pool closing kit offers good value for money, providing significant time and cost savings.
"...Saves me a lot of time and money when opening my pool. And very easy to use with step-by-step instructions." Read more
"Good price and works well" Read more
"...Thank you got being budget friendly, and making this easy to do for our 18 W x 54 H on ground pool." Read more
"...Good price , easy to open and use. Over all happy with it so far." Read more
Customers find the pool closing kit effective and easy to use, providing everything needed for both above ground and in-ground pools.
"...Makes shutting down the pool a breeze and opening it back up less stressful." Read more
"...Has simple instructions and everything needed for a successful DIY closing of a 10000+ gallon, inground pool." Read more
"Seemed simple enough to use and close the pool with this year" Read more
"Good for closing pool" Read more
Customers find this winterizing kit effective and easy to use, with one customer noting it includes everything needed for pool maintenance.
"...The winterizing chemicals worked wonders; after using this kit, my pool was crystal clear when I opened it in the spring...." Read more
"...No staining, no damages, and lasted great in Arkansas's bipolar weather of temperature dropping low to single digits...." Read more
"...The kit has everything you need, and it makes winterizing our pool super easy...." Read more
"The In The Swim Pool Closing Kit provides everything needed to winterize both above-ground and in-ground pools up to 35,000 gallons...." Read more
Customers are satisfied with the pool winterizing chemicals, noting that they keep the water clear and free from algae, with one customer mentioning they are less toxic than traditional chlorine and copper treatments.
"...I love that it includes all the necessary items, from algaecide to winterizing shock, which took the guesswork out of the process...." Read more
"...uncovered we just turned our sand filter on and went right in without the algae or high chlorine...." Read more
"...1/2 of this water is rain and snow melt." Read more
"...Chlorine was completely dissolved by the time I opened the pool...." Read more
Reviews with images

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Top reviews from the United States
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- Reviewed in the United States on February 19, 2025Style: Kit OnlySize: SuperVerified PurchaseI purchased this kit every year when I’m closing my pool when I open in the spring, my water is crystal clear. Saves me a lot of time and money when opening my pool. And very easy to use with step-by-step instructions.
- Reviewed in the United States on April 1, 2025Style: Kit OnlySize: DeluxeVerified PurchaseGood price and works well
- Reviewed in the United States on October 28, 2024Style: Kit OnlySize: DeluxeVerified PurchaseThe In The Swim Pool Closing Kit is a must-have for anyone looking to winterize their above-ground or in-ground pool! This kit contains everything you need to effectively close your pool for the winter, and the instructions are straightforward and easy to follow. The winterizing chemicals worked wonders; after using this kit, my pool was crystal clear when I opened it in the spring. I love that it includes all the necessary items, from algaecide to winterizing shock, which took the guesswork out of the process. If you want a hassle-free way to protect your pool during the colder months, I highly recommend this winterizing kit!
- Reviewed in the United States on December 13, 2024Style: Kit OnlySize: DeluxeVerified PurchaseWe felt the value of this far surpassed what we had purchased in the past from a pool store. We were never overly impressed with the results we saw in the spring with the prior product. This product has good instructions and a couple of steps rather than just one chemical to dump in. We will see how it worked when we open our pool up in the spring.
- Reviewed in the United States on March 17, 2025This is our second year using this product and it does the job. Makes shutting down the pool a breeze and opening it back up less stressful.
- Reviewed in the United States on March 4, 2025Satisfied with product
- Reviewed in the United States on April 1, 2025Style: Kit OnlySize: DeluxeVerified PurchaseGreat closing kit. I will be using it again this coming year. Has simple instructions and everything needed for a successful DIY closing of a 10000+ gallon, inground pool.
- Reviewed in the United States on November 22, 2024This is the 2nd year in a row I've gotten this and it's worked great! Uncovered our pool 2024 summer and it was just clear and cleaned as promised! No staining, no damages, and lasted great in Arkansas's bipolar weather of temperature dropping low to single digits.
When uncovered we just turned our sand filter on and went right in without the algae or high chlorine. Thank you got being budget friendly, and making this easy to do for our 18 W x 54 H on ground pool.