Recently purchased property in central Wisconsin that has a 100 X 300 foot pond. The pond runs to about 8 feet deep but a good part of it (50%) is only 4 to 5 feet deep. It does not seem to have fish and I want to introduce either bluegill and or bass and or catfish. I have a limited budget so deepening the pond and aerating it might be too much. What would be the better and or more economical approach assuming that I would need to deepen it by about 1000 cubic yards.