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In The Swim Opening Kit and Chlorine Bundle - Pre-Measured Opening Kit for Easy Use - 10 Pound Bucket of 3-Inch Stabilized Chlorine Tablets - Inground and Above Ground Pools Up to 7,500 Gallons

  • Based on 15,776 reviews
Condition: New
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Availability: In Stock.
Fulfilled by In The Swim Pool Supplies

Arrives Friday, Sep 12
Order within 8 hours and 28 minutes
Available payment plans shown during checkout

Style: Kit + Chlorine


Size: Basic - 7.5k 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 10 pound bucket of 3 inch stabilized chlorine tablets and 7,500 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: Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water, Prevents Stains


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: Friday, Sep 12

This item is non-returnable:

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


  • 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

  • Great value! Would buy again.
Style: Kit Only Size: Basic - 7.5k gallon
Everything came just as pictured. Chemicals did their job well! Great value for the price. Has lasted us all summer with an above ground best way instant set pool that is 12' by 3' ft. Good instructions for a newbie in pool maintence. Also love that it comes with the oil absorber spunge! We have a manual vacuum and pool skimmer so that helps a lot too. ... show more
Reviewed in the United States on July 21, 2025 by Brad

  • Great starter kit, even for small pools
Style: Kit Only Size: Basic - 7.5k gallon
Perfect for getting started—has everything you need to get up and running quickly. I’m using it with a small 330-gallon blow-up pool, just adding a little at a time, and it’s been working well to maintain the water. Convenient and effective.
Reviewed in the United States on June 12, 2025 by ThomasB

  • 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

  • Great!
Style: Kit Only Size: Basic - 7.5k gallon
This product is a great pool starter kit. Came during the time frame promised. Easy to use!
Reviewed in the United States on August 13, 2025 by Johanna Szin

  • 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

  • it did its thing
Style: Kit Only Size: Basic - 7.5k gallon
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.

  • Average
Style: Kit Only Size: Super - 35k gallon
Good kit not impressed with chemical quality.
Reviewed in the United States on July 22, 2025 by Cmw143

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