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Home Pool Swimming Pool Chemicals United Chemical Products United Chemical Pool Stain Treat 2lbs. Bottle | PST-C12
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

United Chemical Pool Stain Treat 2lbs. Bottle | PST-C12

United Chemical Pool Stain Treat 2lbs. Bottle | PST-C12

  • Use: Stain Removal/Prevention; remove any type of stain from any swimming pool
  • Compatible with: All types of swimming pool surfaces (Note: Pre-dissolve for color plaster/painted pools)
  • Chemical Type: Granular
  • 2 lbs. bottles - Also available: 4 ounce “Spotting Bag”
  • Dosage Rate: 2lbs. per 20,000 gallons of pool water
Purchase Options
The Strength to Handle any Type of Stain!
Pool Stain Treat has the strength to remove stains from any kind of Swimming Pool
Pool Stain Treat is a patented pool stain remover that has the strength to work on any type of stain on every kind of pool surface.
Pool Stain Treat is a powerful chelator and sequestering agent, able to dissolve metals that have stained your pool to dissolve away back into the water. Pool Stain Treat works independent of pH and chlorine levels making it easy to use.
Simply add one bottle of Pool Stain Treat per 20,000 gallons to your pool in the affected area and watch the stains disappear. Pool Stain Treat continues to work for up to 60 days keeping metals water soluble and preventing future stains.
Pool Stain Treat is the most trusted stain remover in the Pool Industry because of its ability to remove the toughest pool stains.

Q & A
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Browse 8 questions Browse 8 questions and 8 answers
How long after using this chemical is it safe to swim?
Jim G on Jun 24, 2019
Will this product work on algae stains on a vinyl liner?
Pamela H on Jun 27, 2020
How long after using Pool Stain treat can yo swim?
charles t on May 27, 2021
BEST ANSWER: I believe its just a chelating agent so as long as the pool is otherwise balanced you can swim once the water has circulated some. At least I always have. I try to leave the pump off for a while and let the product sit in the water near the 'problem areas' (like the steps) for maximum effectiveness
Do you need to use a metal remover while using Stain Treat?
A shopper on Jun 19, 2020
BEST ANSWER: I had a lot of iron in my pool after a new fill/ liner change. I used some metal remover and waited until most of that was filtered out before I used stain treat, but in the past I have used it without checking any of that and it worked great. Great for spot treatment as well, like putting some in a stocking and running along the steps under the water line
Will this product remove green stain from bottom of in-ground pool liner?
Tom M on Oct 10, 2017
BEST ANSWER: The product does say it works for all pool surfaces but to be cautious, I would suggest pre dissolving it before adding it to the pool.
Will this product remove brown osmoses spots from fiberglass pool?
A shopper on Mar 28, 2021
BEST ANSWER: If you are referring to the dark cobalt stains, yes the product will remove them.
will this work on a fiberglass salt water pool?
Dianne on Apr 30, 2020
BEST ANSWER: if the water is brown because of to much iron it will clear it up within 24 hrs.
Do you have pool stain treat in stock?
Bill H on Sep 15, 2021
4.5 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Good product
good product at a fair. Works as directed. Easy directions.
June 20, 2020
over 2 years ago
Rated 5 out of 5
Tried several other products that worked in the past, but failed this year.
This stain remover did the trick....would recommend to anyone.
July 9, 2021
11 months ago
Rated 5 out of 5
Great product
Works great, our pool is sparkling! Easy to use, just read directions.
February 20, 2021
1 year ago
Rated 3 out of 5
Stain remover
Have used only one application. Did not have an effect on the stain at all. Will apply another application this weekend.
May 18, 2018
over 4 years ago
Hay muchas maneras diferentes de contactarnos, y nos gustaría hablar con usted sobre las preguntas de su compra, ayudarle a diagnosticar los problemas de su equipo y escuchar acerca de cómo podemos mejorar y todo lo que está en su mente.
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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