From what you are saying and I am seeing the bass don't have enough bluegill to eat. The bluegill that I catch are mostly over 5" and not a large number of them. Simply not enough of the bluegill are surviving to have a healthy bluegill population. If I am fishing for bluegill with a #10 hook and live red worms and I am catching more bass than bluegill there is a shortage of bluegill. If they want a balanced pond X lbs of bass should be removed and 4"? bluegill should be stocked to bring things back into balance. I am not sure of the size of bluegill that the bass won't try to eat. If this is correct how many bluegill need to be added?
Thanks for your help!