I don't think larger fish are going to solve your problem in time for this summer's swimming season. In fact, stocking a predator fish typically only reduces the number of pan fish. They will still be there just no so many. If fact, you might even see the larger sized panfish get bigger once the possible overpopulation problem is taken care of. There can be a lot to turning a pond's population around, you have come to the right place. Welcome!

Fish on!,
Noel