Guys, if you want the predators to grow, you have to have a pond that has adult forage fish that are too big to become food. If the forage adults were small enough to become food, and the pond manager didn't stay ahead of the predators with manual harvest, then the predators would overeat the forage base and become stunted.
Sunil, you want the pond to be the way it is now. Stock some HSB or even some Hybrid Crappie. I have a customer that has a 4 ac pond that has GSH that are too big for the predators to eat and his HBC went from 2"-4" to 15" in two years.
If I had my druthers, I'd want a pond that had an overpopulation of Shiners. Cheaper on the pocket book than buying them 2x year to stock into the pond!!