Price range: $5.49 through $32.99
Eradicate stubborn mustard algae instantly. Yellow Treat®2 is the trusted, fast-acting algaecide designed to destroy resistant yellow blooms. Safe for all pool surfaces, it restores water clarity and makes pool care simple and predictable.

Win the Battle Against Mustard Algae
When you see that yellowish “dust” on your pool steps or walls that just won’t brush away, you need a solution that delivers results . Yellow Treat®2 is the legendary algaecide formula from United Chemical, specifically engineered to defeat the toughest mustard and yellow algae blooms that standard chlorine alone cannot handle.
The Science of Success
Mustard algae is highly resistant to sanitation. Yellow Treat® 2 works by penetrating the protective coating of the algae, allowing your sanitizer to destroy it from the inside out.
Why Choose Yellow Treat® 2?
Directions for Use
3. Shock: Immediately following application (regardless of your current chlorine reading), add liquid or dry chlorine to “shock” or super-chlorinate the pool. Follow the super-chlorination dosage rates listed on your specific shock product.
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Product Type | Rescue Algaecide |
| Active Ingredient | Sodium Bromide |
| Compatible Sanitizers | Chlorine, Salt, Bromine |
| Compatible Surfaces | White Plaster, Color Plaster, Exposed Aggregate, Fiberglass, Painted, Vinyl |
| Dosage | 5 oz. per 10,000 gallons. |
| Size | 5oz. bag, 2 lb. bottle, 3lb. bottle, 15lb pail, 45lb pail |

Daniel Cruz –
verry good
Keith Feather –
Like the product. Impressed by the way UC stood up to the ridiculous claims by competitors. I do wonder what the other additive, chlorine boost, is, since it is listed as not an active material. I was supposing BCDMH, but that would be listed. Seems to work, but would like more knowledge about this addition to the Yellow Treat.
Scott Hamilton (verified owner) –
Thanks Keith. While the chlorine boost is a secret, I can tell you that it acts as a chlorine stabilizer / hypochlorite scavenger. It is not, however, cyanuric acid. Also, “active” and “inactive” are a bit misleading, as it implies the rest doesn’t doing anything. That’s a bit of a limitation of current EPA labeling requirements. It’s more appropriate for single ingredient products (which this is not).
Mark Lodwick –
Scott, in your response to Keith on June 3, you mention “hypochlorite scavenger”. That sounds counterintuitive for those of us in the pool service industry. Can you elaborate? Thanks
Scott Hamilton (verified owner) –
Hi Mark, great question. A hypochlorite “scavenger” is a compound that simplifies and removes certain oxidation reactions involving hypochlorites and specific organic compounds. A less technical but more direct explanation is that the additional ingredients stabilize hypochlorite. The reaction is somewhat similar to how CYA works, but without the same UV protection – so it won’t necessarily replace CYA. It does however make the hypochlorite and algaecide overall more effective. Hopefully that makes it a little clearer. Cheers
Jan D Dye –
Quality products and phenomenal help to conquer pool issues.
Dennis –
Will this product add to my CYA level? I’m up around 90 and don’t want that to go up anymore.
Scott Hamilton (verified owner) –
No. Yellow Treat contains zero Cyanuric Acid (CYA).
Ron kuykendall –
Inner
I didn’t order enough the first time .probably need 2 more
Steve Roland –
On second dose we’ll see