Jim correct, the aerator hopefully will keep the water open on those really cold days. The air stone is some 50-60' from the dock house future location. My thoughts... 2- 10' long railway ties and 2- 5' railway ties with the 10' length facing south for that southern exposured plexiglass window. These ties will act as a foundation for the approx 10' X 6' dock house and give me a bottom of sand and gravel within the dock house to lay straw onto the gravel floor. Install a large door and remove the straw occassional with new in the winter. Feed the fowl within the duck house and they should return/stay during poor weather????? I will keep them fed with lettuce and corn during the winter. Any idea on how far apart I should build these nesting cyclinders on the islands, every 15' or so or more space????
Rowly
