Are you actually taking out small bluegill for a reason? That is just what your pond needs is bluegill of all sizes. Your bass have now been in there 2 years which if put in as fingerlings could weigh as much as 3-4 lbs in the right situation. You may need to be taking out the bass.
If you are feeding on a regular continuos basis you should be able to throw pellets in the water and watch the largest of the bluegill churning the water like pyrannahs. At least that is my experience. Do you have much cover for the forage and bass to hide in?
