We were dealing with American pondweed and some millfoil.
BTW, I just bought that 71 acre place. It is contigous to my original place. Now I have to get my butt over there and spray some small willows and catch a bunch of 10 inch bass. We stocked the grass carp in the summer. They have really clobbered the vegetation. I caught one of them on a small hook with a piece of night crawler the other day. I guess they are getting hungry. I was bluegill fishing and got a heckuva fight on my ultralight. It was about 18 inches long and had doubled it's size in a year. They definitely work.