I am new here and also new to the pond world. My pond is about 42 inches deep and 12' x 5'. I have a small upper pond and a short moving water feature or river/fall. In the learning curve but I have some old ponds in the area that I can tap for learning. and questions. I am in central Nebraska. My pond is in a sheltered area and I hope to keep water moving all winter. This will be part of the curve I'm sure.