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In The Swim Opening Kit and Chlorine Bundle - Pre-Measured Opening Kit for Easy Use - 50 Pound Bucket of 3-Inch Stabilized Chlorine Tablets - for Inground and Above Ground Pools Up to 35,000 Gallons

  • Based on 21,883 reviews
Condition: New
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$212.98 Why this price?
Save $134.02 was $347.00

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As low as $35.50 / mo
  • – 6-month term
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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by In The Swim Pool Supplies

Arrives Aug 12 – Aug 14
Order within 19 hours and 51 minutes
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Size: 50 Pound


Style: Chlorine + Opening Kit


Features

  • Save time and eliminate the guesswork with our pre-measured pool opening kits, ensuring a hassle-free start to your pool season.
  • Bundle includes 50 pound bucket of 3 inch stabilized chlorine tablets and 35,000 gallon start up kit
  • Fast-Acting Shock: Cal-Hypo formula rapidly eliminates algae, bacteria, and contaminants for crystal-clear water.
  • Clarifier enhances water clarity by coagulating dirt, while The Sun Sorb oil and scum absorber effectively absorbs suntan oils, body oils, grime, and scum, ensuring clear water and improving filter efficiency.
  • 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: Granular, Liquid, Tablet


Product Benefits: Controls Algae


Number of Items: 4


Brand: In The Swim


Item Weight: 2 Pounds


Item Form: Granular, Liquid, Tablet


Product Benefits: Controls Algae


Number of Items: 4


Unit Count: 1.0 Count


Item Weight: 2 pounds


Manufacturer: LPM Manufacturing


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 12 – Aug 14

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
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Pool chemicals
Size: 5 Pound Style: Chlorine + Opening Kit
I buy this every year since it works the best for what pool I have.
Reviewed in the United States on May 12, 2026 by Maya Atkins

  • Good Opening Kit
Size: 25 Pound Style: Chlorine + Opening Kit
Time to open the pool. This kit works good for what I had to do with my pool.
Reviewed in the United States on May 4, 2026 by Wayne Pecchia

  • Everything you need in one kit!!
Size: 5 Pound Style: Chlorine + Opening Kit
This gives you everything you need to get your pool up and running. It's the perfect way to get the summer fun started.!
Reviewed in the United States on April 22, 2026 by Matthew Bacon

  • Starter kit
Size: 5 Pound Style: Chlorine + Opening Kit
Okay starter kit.
Reviewed in the United States on June 1, 2026 by IFISHAZ

  • Perfect for first time pool owners Perfect for first time pool owners
Size: 5 Pound Style: Chlorine + Opening Kit
We aren’t very good at keeping up with the pool and we have no idea what products the pool needs so this starter kit is a stress relief and so far our pool has been looking great!! Has everything u need. Water looks nice
Reviewed in the United States on March 2, 2026 Reviewed in the United States on March 2, 2026 by Angie Ellsworth

  • works well
Size: 25 Pound Style: Chlorine + Opening Kit
cheaper than the hardware store
Reviewed in the United States on December 24, 2025 by Lawrence

  • Chemicals for pools
Size: 5 Pound Style: Chlorine + Opening Kit
Easy instructions on how to use and product works great for my above ground pool.
Reviewed in the United States on July 9, 2025 by maria

  • Pool opener kit.
Size: 10 Pound Style: Chlorine + Opening Kit
We have had problems in the past with the pool water staying clear. This year we used your product and the water stayed crystal clear. Very satisfied.
Reviewed in the United States on August 6, 2025 by Louba smart watch

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