Pond Boss Forums AQUATIC VEGETATION Balance of plants in the environment Starting Water Lillies in an old gravel pit

I recently put sterile grass carp into my lake to control white water buttercup (crowfoot) Ranunculus longirostris. Does anyone know if these grass carp are particularily fond of eating my hybrid water lilies? I can easily control the numbers of grass carp but if they eat my water lilies first, I'll have to protect them.