The best and most trusted yellow algae removal product. The Original and still most effective yellow/mustard algae treatment in the world today. Yellow Treat is a non-toxic algicide and can be used in pools and spas.
Contains Zeos, which will add a sparkle or polish to your pool. Hottest formula in California & Florida, the 2 toughest areas in the world. Safe for you & your pets. Comes in powder form. 5 ozs treats 10,000 gallons.