Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants lilies in containers

Frank in larger body of water the grass carp do little if any damage to lillies. However I stuck 100 little 3-5 inchers in my ornamental pond b/c a client backed out of purchase and had nowhere to put them. They nearly ate them to nothing b/f I noticed it in about 2 weeks. BUt like I said we have clients with lillies and grass carp and they do little damage. All situations are diff.