I have a very small pond (5000-6000 SF, 5-7' deep max) that even with aeration would be a challenge to keep at a reasonable DO level, especially in the winter. Right now the only life in the pond is turtles and frogs and I really just want my kids to be able to catch some fish. Another poster on a thread here suggested bullheads, eastern mudminnows, and killifish. I would imagine that the mudminnows and killifish should be easy to find, but bullheads, especially brown bullheads, which are supposedly the most low DO tolerant, seem to be tough. Ironically, the State Division of Fish and Wildlife raises and stocks them, but the only fish they sell to the public are triploid grass carp (with a permit) and a certain type of minnow that controls mosquitos. Anyone have a good source for these in the Northeast? Can they be shipped long distance for a reasonable price? I'm completely new to this and have never bought or stocked fish.