First, welcome to Pond Boss.
I fully agree with the advice of our good friend ESSHUP.
If you are feeding with pellets, I've found that grass carp are then real suckers for bread balls. I've caught them by pulling the crust off a piece of yucky white bread (like Wonder Bread), and forming the remainder around a medium size hook (1/0). Tossing such a big ball in at feeding time sure seems to make them vulnerable.
I'm currently out of grass carp in my pond, and it is time to bring in replacements.
