Search  for anything...

United Chemicals SWAM-C12 Swamp Treat Pool Algae Eliminator, 1-Pound

Based on 486 reviews
Condition: New
Checking for the best price...
$28.31
Save $1.66 was $29.97

Buy Now, Pay Later


As low as $7 / 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.

Free shipping on this product

FREE 30-day refund/replacement

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.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: 19 left in stock
Fulfilled by Amazon

Arrives Monday, Nov 2
Order within 15 hours and 57 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Model
SWAM-C12
Weight
16 oz
Item Form
Granular
Product Benefits
Controls Algae, Kills Bacteria

Features 4

  • TURN GREEN POOLS BLUE IN 24 HOURS: Swamp Treat is the ultimate "Green-to-Clean" accelerator that rapidly transforms the worst green, algae-filled swamps into crystal-clear water. See dramatic results in as little as 24 hours so you can get back to swimming faster.
  • NON-STAINING & SAFE FOR ALL SURFACES: Contains zero copper, heavy metals, or ingredients that stain pools. You get a powerful algae-killing treatment that is 100% safe for all pool finishes, including plaster, vinyl liners, and fiberglass.
  • MAXIMUM KILLING POWER: Don't wait days for phosphate removers to work. Swamp Treat acts as a powerful catalyst that forces your chlorine to do the work of 10 gallons. It directly attacks and kills live algae immediately, regardless of high phosphate levels.
  • EASY TO USE & HIGHLY CONCENTRATED: A single 1 lb bottle treats up to 20,000 gallons of pool water. Simply broadcast the formula directly over the greenest parts of the pool, immediately follow up with liquid chlorine or shock, and run your pump 24/7.

Description

This swamp treat is the most powerful algae killing formula for pools. Your pool will go from a green swamp to blue in few hours. As the filtration system kicks in swamp treat accelerates your chlorine's ability to fight algae blooms. 1-Pound bottle will treat up to 20,000 gallons of water. Non-toxic formula does not contain any metals. This product weighs 1-pound.

Specs 13

Brand United Chemical
Item Weight 16 ounces
Item Form Granular
Product Benefits Controls Algae, Kills Bacteria
Brand Name United Chemical
UPC 730928035265
Global Trade Identification Number 65
Number of Packs 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 2

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


Great Product. Really Works.
I used this product for years until my local pool supply shop closed. While using it, I never had any algae problems. Last year, I could not find Swamp-Treat, so I used another brand. Worst algae problems I ever had. Constantly fighting yellow algae and even worse, could not get rid of the pink algae. Thankfully, I was able to locate Swamp-treat through amazon, and I don't expect any problems this year. ... show more
Reviewed in the United States on May 14, 2025 by Al Murray

Swamp Treat is AWESOME!!!
Went from picture 1 to picture 2 overnight. We went away for a couple weeks and came home to a green pool. I ordered the Swamp Treat and while I waited for it to come, for 3 days I brushed the sides and cleaned the filter everyday with not much improvement.
Reviewed in the United States on October 22, 2024 by Paula H

DO NOT USE THIS
What the pool store and this chemical does not tell us is that if you use this, it will clear your algae for a minute. Then when you add more chlorine, you have to add 3 times the amount, as it has to burn this chemical off first. To get rid of algae get your PH adjusted then add liquid chlorine at dusk, scrub everything and let it run all night. Voila!!!! ... show more
Reviewed in the United States on September 20, 2026 by Amazon Customer

No more algae!
This treatment is the real deal. It keeps our pool beautifully clear. I highly recommend this product if you have algae swamp problems. It attacks green algae like magic. Price and ease of use is awesome.
Reviewed in the United States on January 18, 2026 by MissyMD

Maybe Super Chlorination is a better method.
I guess it sorta works. A good youtuber pool guy suggests super chlorination (3X normal for my case) to get rid of the green. That worked for me. I may not have needed this since it was not as effective for pool opening.
Reviewed in the United States on July 15, 2025 by AnnV

Works as long as you follow the directions!!! Miracle worker!
Ok! I was basically at a stand still with my pool. The pump got turned off during vacation and I come back to a tad poll green smelly pool. It smelled more like a pond then a pool. I was about to empty my 11000 gallon pool (we have well water so I would have had to get another water delivery which is 600.00)when i found this stuff online. So I figured wed give it one last go. We got the bottle put in about half super chlorinated it and it turned light green....so i put in the other half same process and bam bright blue the next day. Yes it was foggy and i had to use some flocculant on it and then vacuum but lord am I happy i found this stuff. Buy it!! This product wont let you down. Just follow the directions! ... show more
Reviewed in the United States on August 12, 2019 by jeffrey fuston

It works
You don’t get but half a bottle. Luckily it works! I won’t buy again since you get less than half a bottle.
Reviewed in the United States on March 31, 2022 by Tracey

Swampy pool
Works very well within a few days after initial pool opening.
Reviewed in the United States on June 1, 2026 by Dawn L
Checking for best price...