My pool water is lime green, it is a inground and is 26' x 36' approximately 20,000 pounds of water.

My pool guys said is from algea that is being fertilized by yard fertilizers that become air born? I have a sand colored soot at the bottom. I am the only pool in the neighborhood with this problem. Not sure what to do. I have been to pool stores with no help, just keep dumping chemicals at no avail.

Is my pool company correct or should I be looking for something else?