Search  for anything...

In The Swim 1 Inch Bromine Plus Tablet Sanitizer for Spas, Hot Tubs, or Swimming Pools - Pre-Stabilized, Low Odor, Chlorine Alternative – 3.5 Pounds

  • Based on 377 reviews
Condition: New
Checking for the best price...
$39.99 Why this price?
Save $15.00 was $54.99

Buy Now, Pay Later


As low as $9 / 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, Apple Pay, and PayTomorrow. 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 Saturday, May 16
Order within 40 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Style: Bromine Plus


Size: 3.5 Pound


Features

  • Effective Sanitizer: Bromine is an excellent alternative to traditional shock sanitizers in swimming pools, spas, and hot tubs, effectively eliminating bacteria, viruses, and algae to maintain clean and safe water.
  • High Bromine Strength: In The Swim 1-inch Bromine Tablets Plus offer enhanced sanitizing power with 98% active ingredient, an improvement over our regular bromine tablets that contain 96%, ensuring stronger disinfection in pools and spas.
  • Stable in High Temperatures: Bromine is more stable than chlorine in higher temperatures, making it ideal for hot tubs, where heat can break down chlorine more quickly.
  • Low Odor and Less Irritation: Bromine is less irritating to the skin and eyes compared to chlorine, making it a preferred option for swimmers with sensitive skin.
  • Effective at Higher pH Levels: Bromine remains effective at higher pH levels and can be reactivated with an oxidizer, providing greater flexibility in water chemistry management and more efficient use with fewer additions.

Brand: In The Swim


Item Weight: 3.5 Pounds


Item Form: Tablet


Product Benefits: Kills Bacteria, Maintains Clean Sanitized Water


UPC:


Brand Name: In The Swim


UPC: 758293072524


Manufacturer: ALL CHEM INDUSTRIES


Unit Count: 56.0 Ounce


Item Form: Tablet


Product Benefits: Kills Bacteria, Maintains Clean Sanitized Water


Item Weight: 3.5 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 16

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


  • Great product
Style: Bromine Plus Size: 8 Pound
These work very well for me. One tablet lasts for three days in a 400 gallon hot tub. Very economical. Happy with results.
Reviewed in the United States on December 4, 2025 by James Witman

  • Reliable Bromine Tablets That Keep Water Crystal Clear
Style: Bromine Plus Size: 50 Pound
These tablets are excellent for maintaining clean and safe water in my spa and pool. They dissolve evenly, provide consistent sanitation, and keep the water sparkling without a strong chlorine smell. The 50lb size is a great value and lasts a long time. I am very happy with this product and will continue to purchase it. ... show more
Reviewed in the United States on September 24, 2025 by HIEX FW

  • Good product, very useful and effective
Style: Bromine Plus Size: 3.5 Pound
I bought these for use in a couple of architectural water pumps that I have in order to keep the water clearer. They perform great. They don't dissolve too fast and they do exactly what I wanted them to do.
Reviewed in the United States on October 10, 2025 by UrbanRedneck

  • All I needed
Style: Bromine Plus Size: 3.5 Pound
for my spa all that is needed. One tab dropped into the skimmer about every 2-3 days. Did not need all the "printer ink" cartridges to keep the water clear and safe. Big savings of time and money.
Reviewed in the United States on April 5, 2026 by RodOnIsle

  • Work efficiently
Style: Bromine Plus Size: 3.5 Pound
Works great for my hot tub I go through about 2 tablets per week
Reviewed in the United States on February 22, 2026 by Stephanie

  • Glad I bought volume discount
Style: Bromine Plus Size: 8 Pound
Quality chemical, perfect size for my spa disperser. Good value better than local hot tub store.
Reviewed in the United States on May 19, 2025 by Handyman Pro

  • Works great for my spa!
Style: Bromine Plus Size: 8 Pound
A solid choice - these brom tabs work as good as any brand found in the pool/spa stores. No complaints with odor or anything!
Reviewed in the United States on December 11, 2025 by bat_dan

  • Tablets
Style: Bromine Plus Size: 50 Pound
Great product good value
Reviewed in the United States on February 27, 2026 by Amazon Customer

Can't find a product?

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