Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants killing coontail

Thanks for the great comments. My problem is with White Water Crowfoot (Buttercup) Ranunculus flabellaris. It and Yellow Water Crowfoot look very much like coontail. They hold their white or yellow flowers just above the surface.

We have 15 grass carp in 4 acres that we put in last year. They were 12-14 inches long when we put them in. Obviously we don't have enough, they aren't big enough or they don't like this plant.

My biggest concern is that we have a number of hybrid water lilies in the area. Is there any herbicides that would control the crowfoot but not kill the water lilies? Any ideas would be greatly appreciated.