Thank you all for your answers. My Koi eat my water lilies?

Thank you all for your answers. My Koi eat my water lilies, is there anything I can substitute for this so they will stop?!

Thank you all for your answers. My Koi eat my water lilies?
Collect your kitchen greens and give them a real treat. Old lettuce, celery leaves, and even carrot tops are great. Allow the fish to eat for 30 minutes and then remove the excess.
Reply:I put water lettuce in my pond just becase my fish were eating up the lilies. . my coworker said she feeds her Koi watermelon and they love it.
Reply:koi do that naturally. they like to tear up the roots. I don't think they'll ever stop. usually koi are kept in koi ponds with no plants. regular goldfish do better in ponds with plants.