I believe the ground water flow is much higher through the pond than normal (for a pond dug into the water table) because the Rock River runs adjacent to the pond. Those additive influences really hustle the water through the pond and stabilize the water temperatures top to bottom.
The year-around high D. O. levels top to bottom are a puzzle the pond inhabitants enjoy. I suspect that for some reason the ground water in the area has a high oxygen content. I need to sample the few shallow wells that are left on nearby properties to see if that may be true.
