Future blue-cat/crappie pond is just shy of 1/2 acre but only has FHM and lake chubsucker in it so far. The clay is only relenting to plant growth very slowly, so I have held off adding any other species until I have good emergent plant cover. With our very dry weather, the pond is down 2' which is the most that I have experienced. I also added an elbow to the drain this year, so it needs 3' to reach the new full-pool level (and may reach a full 1/2 acre of surface area too). Still looking for a source of blue cats as well.