Green Treat® is formulated to wipe out the largest blooms of green algae. Just add 2 lbs per 20,000 gallons, brush, and shock, and your pool will be back to clean in no time. It also contains no ingredients that stain, meaning you can get rid of your green algae now without worrying about stains later. And just like all United Chemical products, it’s backed by our 100% Performance Guarantee. So treat the green and get your pool back to clean with Green TreatⓇ.