Search  for anything...

In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast Dissolving, pH Balanced Sanitizer - 56% Available Chlorine, 99% Sodium-Dichlor – 40 Pound

  • Based on 2,165 reviews
Condition: New
Checking for product changes
$271.99 Why this price?

Buy Now, Pay Later


As low as $45.33 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Jun 21 – Jun 23
Order within 16 hours and 18 minutes
Available payment plans shown during checkout

Size: 40 Pound


Features

  • In The Swim's granular chlorine is ideal for use in swimming pools, spas, fountains and water features
  • Powerful sanitizing powder that destroys bacteria, breaks down contaminants and kills algae
  • Calcium-Free formula keeps hard-water pools sparkling clean and crystal clear
  • Contains premium-quality 56% available stabilized chlorine
  • 99% Sodium Dichloro-S-Triazinetrione Dihydrate

Brand: In The Swim


Item Weight: 44 Pounds


Item Form: Granular


Product Benefits: Contaminants,Destroys Bacteria,Kills Algae


UPC:


Brand: In The Swim


Item Weight: 44 Pounds


Item Form: Granular


Product Benefits: Contaminants,Destroys Bacteria,Kills Algae


UPC: 803354120765


Number of Items: 1


Unit Count: 640 Ounce


Product Dimensions: 16 x 13.9 x 13.2 inches


Item Weight: 44 pounds


Manufacturer: In The Swim


Item model number: C4045


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 21 – Jun 23

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Way better deal than Leisure Time Spa 56, works better too.
Size: 40 Pound
After years of paying $40+ for 5lbs of Spa 56 from Leisure Time and being mostly satisfied, I ran into the problem this year of the bleach shortage and could not find the stuff anywhere...which is what forced me to just say what the heck and invest in the most giant tub of granules I could find just to avoid dealing with the shortage. Mind you, a 5lb canister of Spa 56 lasted me around 1 year, so this would last me likely 8 years at least and at $140 that's still a deal. So, I expected this to be bottom barrel stuff considering the price and what I got was a product that works in my hot tub much better than Leisure Time did. I'm using less of this, less often, and getting better results. It lasts longer, and is far more stable. I'm no chemist, or pool/spa professional, but I can tell you that I'm using this less, it smells more like a spa/pool smell and feels better in the water. With Spa 56, if I missed a day late or two from the usual treatment regiment routine, it would cause an unbalance. Spa 56 was very unstable, it seems. I was just so used to using it, I never noticed. If I was 2 days late, usually my tub would start smelling like old socks. I have been 3 days late with this already and the test strips all still read fine. Sure, the chlorine levels were a little low, but I've still got a nice clear water and no smells. Maybe its not the right fit for everyone, so I won't sit here and tell you to stop using what you're using and get a 40 lb tub of this, but if you want to grab a smaller portion and give it a go, you may be pleasantly surprised. Based on the rate I'm using this, I'm looking at a good decade or more off this one bucket. ... show more
Reviewed in the United States on October 24, 2020 by Strike Commando

  • Works great
Size: 5 Pound
Did a lot better job than I thought it would for a lot less than what the Pool store suggested a highly recommend this
Reviewed in the United States on October 18, 2024 by Jason

  • Shipping dependable
Size: 40 Pound
item was delivered in good condition .
Reviewed in the United States on April 1, 2025 by Dana Dempsey

  • good product
Size: 25 Pound
Good product and cheaper than Crystal Pools prices...
Reviewed in the United States on June 24, 2024 by Loretta Emanuel

  • Pool
Size: 25 Pound
Perfect
Reviewed in the United States on March 28, 2025 by Howard Shiff

  • fast shipping
Size: 2 Pound
I got the product very quickly and will use it on gopher holes with some water. Cover the hole and the gas will drive away the gophers.
Reviewed in the United States on March 2, 2025 by Amazon Customer

  • Works great
Size: 5 Pound
Does it’s job
Reviewed in the United States on November 19, 2024 by Kim staats

  • wrong choice.k
Size: 25 Pound
I was looking for bags of chlorine to shock my pool.
Reviewed in the United States on April 16, 2025 by james r wilson

Can't find a product?

Find it on Amazon first, then paste the link below.