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In The Swim

In The Swim Opening Kit and Chlorine Bundle - Pre-Measured Opening Kit for Easy Use - 25 Pound Bucket of 3-Inch Stabilized Chlorine Tablets - Inground and Above Ground Pools Up to 15,000 Gallons

  • Based on 15,573 reviews
Condition: New
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$153.98 Why this price?
4th of July Sale · 13% off was $176.04

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Availability: In Stock.
Fulfilled by In The Swim Pool Supplies
Arrives Tuesday, Jul 8
Order within 15 hours and 56 minutes
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Style: Kit + Chlorine


Size: Deluxe - 15k gallon


Features

  • Stress-Free Pool Opening: Pre-measured kit removes guesswork and saves time, making it easy to kick off the pool season.
  • Bundle includes 25 pound bucket of 3 inch stabilized chlorine tablets and 15,000 gallon start up kit
  • Powerful Chlorination: Includes 3-inch tabs with 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine for long-lasting, UV-protected sanitation.
  • Startup Clarity & Algae Control: Algaecide works with shock to combat algae growth, while Clarifier and Sun Sorb boost water clarity by removing oils, grime, and scum for a cleaner, well-filtered pool.
  • NOTE: This bundle will likely ship in multiple packages, which may come from different locations and arrive on separate days. Please allow an extra day or two for all items to be delivered.

Brand: In The Swim


Item Weight: 2 Pounds


Item Form: Tablet


Product Benefits: Kills Bacteria, Prevents Stains, Controls Algae, Maintains Clean Sanitized Water


Item Weight: 2 pounds


Manufacturer: ALL CHEM INDUSTRIES


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jul 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

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.

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Top Amazon Reviews

    • The Ultimate Pool Opening Kit!
Style: Kit Only Size: Super - 35k gallon
I can't say enough good things about the In The Swim Pool Super Opening Chemical Start Up Kit! If you're getting ready to open your pool for the season, this kit is an absolute must-have. Whether you have an above-ground or in-ground pool (up to 35,000 gallons), this kit has everything you need to get your pool sparkling clean and ready for swimming. The instructions are super clear and easy to follow, so even if you're a pool-opening newbie, you’ll have no problem. It includes everything from chlorine shock to algaecide, which is perfect for getting rid of any buildup from winter. I also love that it comes with scale and stain preventer—a great way to protect your pool surfaces right from the start. What really impressed me was how quickly the pool started to clear up. After applying the chemicals, the water was noticeably clearer within just a few hours. I was able to swim in just a couple of days, and the water has stayed crystal clear ever since. The quality of the chemicals is top-notch. I’ve used other pool start-up kits before, but none of them had the same effective results as this one. It’s definitely worth the price for the convenience, effectiveness, and peace of mind it offers. If you're looking to get your pool ready for summer with minimal hassle, this kit is absolutely worth it. Highly recommend to anyone with a pool, big or small! ... show more
Reviewed in the United States on June 2, 2025 by Justin Morgan
    • Works great!
Style: Kit Only Size: Basic - 7.5k gallon
Worked great! Followed the directions word for word and the next day my pool looked 10x better. Still have to vacuum and scrub the floors and walls. This treats the water only so for new pool people this not a one and done solution.
Reviewed in the United States on June 26, 2025 by Corey6678
    • Perfect Spring Opening Kit
Style: Kit Only Size: Deluxe - 15k gallon
I've purchased this kit for 3 years now for my spring pool opening. I have a 12'x24' rectangle pool and this kit works perfectly for me every year. It has all the needed chemicals to get your pool up and running after winter. Testing kit is easy to use and the product has great instructions on each bottle for what to do. The oil sponge works great and lasts a long time in my skimmer. Only con is they could probably included 1-2 more packages of shock. ... show more
Reviewed in the United States on June 5, 2025 by Jeremy
    • Everything you need in this kit!
Style: Kit Only Size: Deluxe - 15k gallon
Great product. Everything you need to get your pool ready for the season. Clear instructions on how much of each product to use. Enough to get me through almost the entire swim season. Just picked up a couple extra shock treatments at my local store towards end of season. Bought again this summer !
Reviewed in the United States on June 10, 2025 by Amazon Customer
    • Good product
Style: Kit Only Size: Deluxe - 15k gallon
Great product. I’ve used many times in the past. Nice to get the kit to have most of the chemicals you need to start up or close down your pool.
Reviewed in the United States on June 23, 2025 by Barbara
    • it did its thing
Style: Kit Only Size: Basic - 7.5k gallon
Review Image by Ashley P. Ashley P.
Review Image by Ashley P. Ashley P.
Literally revived my pool’s water. The cover ripped late in the winter so it was pretty gross and it got it nice and clear, along side a filter and some chlorine tablets. I followed the order on the product listing, not the one that was on the paper that came with it. Amazing work. My pool is also way smaller than this kit is made to treat so I just guesstimated the amount I needed of eat chemical. ... show more
Reviewed in the United States on May 30, 2025 by Ashley P. Ashley P.
    • great value
Style: Kit Only Size: Super - 35k gallon
really great value its worth buying just for the value of the algecide and stain remover content in kit alone compared with a retail store. I really liked that the kit has everything one needs for pool opening and is a good value for even buying it to stock up on supplies than buying them individually. ... show more
Reviewed in the United States on June 5, 2025 by computer geek
    • Okay
Style: Kit Only Size: Deluxe - 15k gallon
Kit was ok. I applied more chemical than suggested for my pool size, and it hasn’t brought Ph or alkalinity up to standard. I’ll have to purchase some additional product tomorrow.
Reviewed in the United States on June 9, 2025 by Brian Buick

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