Search  for anything...
In The Swim

In The Swim Pool Basic Opening Chemical Start Up Kit - Above Ground and In-Ground Swimming Pools - Up to 7,500

  • Based on 5,865 reviews
Condition: New
Checking for the best price...
$27.99 Why this price?
Save $0.50 was $28.49

Buy Now, Pay Later

As low as $6 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – 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, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. 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 In The Swim Pool Supplies
Arrives Aug 27 – Aug 29
Order within 12 hours and 43 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Style: Kit Only


Size: Basic - 7.5k gallon


Features

  • Dual-Purpose: use it at the start of the season to get your pool swim-ready or keep your water balanced all season long with a bundled set of essential chemicals at a great value.
  • (1) bag of 99% sodium dichlor (Di-Zap), which will get your pool water clean, clear, and safe to swim in.
  • Clarifier keeps your water crystal clear by coagulating dirt, which helps your filter be more efficient.
  • Algaecide works in conjunction with pool shock to defend against multiple types of algae from invading your swimming pool.
  • Sun sorb oil and scum absorber will soak up suntan oils, body oils, grime, and scum, keeping your water clear.

Description

Keep your pool crystal clear all season with slow-dissolving chlorine tablets that deliver powerful, long-lasting sanitization and UV protection—ideal for floaters and feeders. Cal-Hypo perfect for deep-cleaning pools, spas, and hot tubs. Maintain a pristine pool that's safe to swim in right away and gentle on your eyes and nose. Granular formula raises alkalinity, stabilizes pH, and ensures clear, safe water for pools, spas, and hot tubs. 3 Inch Chlorine Tablets Cal-Hypo Pool Shock Alkalinity Increaser pH Increaser pH Reducer

Brand: In The Swim


Item Weight: 5.3 pounds


Item Form: Granular, Liquid


Product Benefits: Maintains Clean Sanitized Water


UPC:


Brand Name: In The Swim


UPC: 758293001135


Package Size Name: Basic - 7.5k gallon


Number of Items: 4


Unit Count: 96 Fluid Ounces


Manufacturer: In The Swim Discount Pool Supplies


Model Number: KSB075001AE


Manufacturer Part Number: KSB075001AE


Item Form: Granular, Liquid


Product Benefits: Maintains Clean Sanitized Water


Item Weight: 5.3 pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 27 – Aug 29

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
  • 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.

Similar Products

Top Amazon Reviews

    • Solid startup kit
Style: Kit Only Size: Basic - 7.5k gallon
This basic pool opening kit was a great, no-stress way to get my pool up and running for the season. It comes with everything you need to get started, which is perfect if you don’t want to guess what chemicals to buy separately. The instructions were easy to follow, and the kit helped clear up my water pretty quickly. It’s sized well for smaller pools (up to 7,500 gallons), so it worked perfectly for my setup without feeling like I was over- or under-treating. I also like that it simplifies the whole process—just open, follow the steps, and you’re on your way. It’s especially helpful for beginners or anyone who wants a convenient all-in-one solution. Overall, a solid starter kit that takes the confusion out of opening your pool and gets the job done. ... show more
Reviewed in the United States on May 1, 2026 by Kayler
    • Great Start Up Pool Package
Style: Kit Only Size: Basic - 7.5k gallon
I have used In The Swim products for our above ground 15' by 24' pool for a few years now. I have always been very happy with the results. The start up kit is perfect and you save much money instead of buying individual products that you must measure per pool size and then store the remainder.
Reviewed in the United States on July 12, 2026 by LoLo
    • Great And easy pool Opening kit!
Style: Kit Only Size: Basic - 7.5k gallon
I also buy this starter kit when opening my pool! Works great!
Reviewed in the United States on July 9, 2026 by Amazon Customer
    • Quality
Style: Kit Only Size: Basic - 7.5k gallon
Good
Reviewed in the United States on July 10, 2026 by Joey Hatton
    • Perfect for a fresh summer start!
Style: Kit Only Size: Basic - 7.5k gallon
Review Image by Oscar
Review Image by Oscar
Review Image by Oscar
We just set up our pool for the season and decided to use this start-up kit to get the water ready. It was incredibly straightforward to use and took all the guesswork out of the process. Within a very short time, the water was crystal clear and looked amazing. It’s exactly what we needed to get the summer started on the right foot. Great value for the price and highly recommended for anyone opening their pool! ... show more
Reviewed in the United States on April 23, 2026 by Oscar
    • Great results
Style: Kit Only Size: Basic - 7.5k gallon
The products are great, they worked on my 15' above ground pool within 2 hours. I was able to see the results almost immediately. I would definitely recommend this products. I was doing a trial and now I want to continue using them. The results are guaranteed.
Reviewed in the United States on June 6, 2026 by Veranol
    • not particularly helpful or easy
Style: Kit Only Size: Basic - 7.5k gallon
So this is a seasonal opening / startup kit. not a new pool startup kit. the instructions are not particularly helpful or clear. It's all fairly easy to add the chemicals but it has nothing to adjust. it comes with test strips but the test strips aren't helpful because it doesn't tell you what to do if it's not in normal/good range. ... show more
Reviewed in the United States on July 28, 2026 by Amazon Customer
    • Great value starter kit
Style: Kit Only Size: Basic - 7.5k gallon
This pool starter kit was a fraction of the price of others and just as good. My pool water is clear and clean and ready to start the summer season right!
Reviewed in the United States on May 31, 2026 by Jen Wolf

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...