Bill Cody,
A lot of good information there, Bill!
We have had the DO checked mid-August and after a long winter ice cover in mid-February. In both cases, the DO was very adequate.
The deepest area in the pond is 15 feet and the water is clear to medium-stained year-around.
We have a northwest to southeast ground water flow that is fairly significant as it keeps open water around the north and west shoreline of the pond. Currently we have 17� of ice elsewhere and those areas still remain open.
I plan to check DO periodically, but for know, it appears that it won�t be a problem unless something else changes.
It pays to be flexible in most things and I think that may be true of pond management as well.
Thanks - Dwight