I would put in a couple hundred copper nose bluegill, as long as you have cover. I would return the 3 pounders and take as many smaller bass as you can get out. I added 400 cnbg to my 2 acre pond that had no bait fish, and many many small stunted bass. I now have mature cnbg and the food chain seems in balance now. I fished the pond hard, throwing many small bass on the bank. It can be done. Larger bass prefer larger prey, so they are probably eating smaller bass. Small cnbg aren't that expensive. You could also catch large Bg and release them, but they might be more attractive prey than the smaller BG.
