Historically the lake I live on has done annual treatments to the lake to keep the weeds at Bay. These are herbicides that I'm sure aren't the greatest for the environment or the humans. We are considering transplanting grass carp to take over weed control. Anyone have any experience with these fish? Work well/terrible/smelly? And advice would be appreciated. I'm in the pnw and the local wildlife department does approve as the fish are all sterile.