Pool owners battling that stubborn yellow or mustard algae, this United Chemicals Yellow Treat is literally the gold standard for getting your water crystal clear again!

This stuff has been around for years because it actually works when other algaecides fail.

The 2-pound container treats a massive amount of water - just 5 ounces handles 10,000 gallons in swimming pools.

The sodium bromide formula is what makes Yellow Treat so effective against mustard algae, which can be really tough to eliminate with regular chlorine alone.

It works by enhancing your chlorine's killing power, creating a super-chlorination effect that wipes out algae blooms quickly.

The non-toxic formulation is safe for pools and spas when used as directed.

Application is straightforward: broadcast it across your pool surface, brush the affected areas, then super-chlorinate with your regular chlorine product.

The instructions are clear about waiting until chlorine levels drop to 3 ppm before swimming again.

For spas, you use a smaller amount proportional to your water volume.

What's really impressive is how quickly you see results - often within 24 hours, that ugly yellow algae is gone.

The 2-pack gives you plenty for multiple treatments or to keep on hand for prevention.

Whether you're dealing with an active algae bloom or want to prevent future outbreaks, Yellow Treat delivers proven performance that pool professionals have trusted for decades.