Thanks to all that replied. After looking at a few pictures I believe I have an increasing Water Primrose problem. While one poster tells of Grass Carp eating it, mine definitely do not. At least not enough to knock it back. As far as the "fishing" goes. Sounds like a whole lot of bad ways to solve the problem, if it is one. Anybody know what the life expectancy of a Grass Carp is? Perhaps knowing that would help!
