Yellow Treat®


5.00 out of 5

5 ounces treats 10,000 gallons
Reduced shocking
Won’t stain

SKU: YT Category:

We believe the more often the same problem occurs, the easier it should be to solve. And few things can be as persistent as yellow algae. That’s why we have Yellow Treat®: it was the first product in the marketplace to utilize sodium bromide and is still a mainstay for pool service techs from CA to FL. It’s formula is so powerful that just a 5 ounces can treat up to 10,000 gallons. For over 40 years, Yellow Treat® has been the most trusted algae solution on the market – making persistent mustard algae easy to kill.

It is a violation of federal law to use this product in a manner inconsistent with labeling. Always add Yellow Treat® directly to pool or spa.

  1. For swimming pools, add 5 ounces (one level capful) of Yellow Treat® per 10,000 gallons by broadcasting directly onto pool water surface. For spas, add the equivalent of 1/4 ounce per 500 gallons by broadcasting directly onto pool water surface.
  2. Brush pool or spa.
  3. Independent of chlorine level, immediately add liquid or dry chlorinating product for super-chlorination. Use the recommended dosage rate for superchlorination from an EPA registered chlorinating product.
  4. Before swimming, use test kit for measuring chlorine level, as directed on your chlorinating product label. Do not enter the water or swim until the chlorine residual drops to 3 ppm.
  5. To prevent the reoccurance of yellow and mustard algae and maintain crystal clear water, No Mor Problems® may be used in conjunction with chlorinating and brominating products. Follow the directions for use for No Mor Problems® and maintain the chlorine or bromine level recommended on your chlorinating or brominating product.

Yellow Treat SDS

Safety Data Sheet


  1. Jim Guyton

    Yellow Treat completely removed mustard algae from my pool. However, I get a zero reading for chlorine, and I have added 5 pounds of shock chlorine.

    • Scott Hamilton

      This can happen depending on your type of chlorine. I would chlorinate as normal and use an OTO test for the chlorine (they are more accurate). I wouldn’t advise to continue to shock, since this can cause staining (and can be expensive). Although your test is giving you a zero reading – the pool shouldn’t develop algae (it’s more of a false reading). If the problem hasn’t subsided in a week, call us and we can diagnose why your pool is continuing to have this problem. Thanks!

  2. Jerry

    Is it okay to use Calcium Hypochlorite with this product?

    • Scott Hamilton

      Absolutely. Yellow Treat can be used with any type of chlorine. Thanks!

  3. Ed

    I have been having some trouble with mustard algae. I added the yellow treat according to directions and super-shocked it after. I tested the water the next day and was surprised to read that I had no CH (calcium). Does the yellow treat react with calcium? Do you know why this might happen. My test was with a Taylor K2006C kit.

    • Shawn Potter

      When you have time please call the United Chemical tech support number 800-524-5550. I have some questions for you as well as some details I’d like to go over with you.

  4. Gerry B

    Do I need to run the pump 24 hrs. After treatment?

    • Shawn Potter

      Yes it’s always a good idea to run your pump for the first 24 hours when doing an algae treatment. Then backwash your filter to remove as much of the dead algae from the system as possible.

  5. Jessica Ducote

    How long after adding the yellow treat should I see results?

    • Shawn Potter

      You will typically see results with in the first 24 – 48 hours. Please let us know if you are having any problems with your algae. We are here to help. Thanks.

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