I've noticed this growing in the back end of my pond for the last year or so. Last year, it wasn't this bad. The best I can tell it is plain grass. I have some reward but I've been told it kills what it touches and I need something that kills to the root and doesn't hurt the fish. I will be using a sprayer that holds 35 gallons of water behind my tractor so I can spray out a long way and hold a lot of herbicide. Does anyone know what I can use to kill this stuff withouit having someone dig it out?

Thanks!!!