I have found the best way to keep CC from eating much is to put a hook and bobber in the water just before and during the time the pellets are in the water. You may get one on the hook occasionally, but most of them will avoid the feeding area while you have a pole there, for some time to come.

"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
[Linked Image from i.pinimg.com]