Chicken liver is the key on our water. We caught 20 yesterday up to 12 lbs. on a 1.5 acre pond. Kept 4 about 24 inches. Have fed them fathead minnows every other year at about 10 lbs. each time. Other than that there is one feeder for pellets that goes off twice a day. I feed about 150 lbs. every month or so. Except stop feeding in Nov. and start up again in Mar. The water is red from suspended clay particles but that has not hurt the cc one bit. Also they are reproducing. Spotted a bunch of 1-2 inch fry this weekend. Seems a bit early for small ones but there they were and already nibbling on the pellets. Started with about 150 six years ago. We tried shrimp, stink bait, cut bait, live minnows, velveeta cheese and nothing worked except chicken liver. All that is stocked in this tank is cc. I also think 450 is a bit much for that size water.