BZ- Thanks for the info - Do you have any trouble with your airlines freezing? Can you describe how you have your system setup, for example how far from your pond is your aerator, what diameter hose do you use. Also do you have any water flowing through your pond or is it an excavated pond.

My pond is a little deeper but only 1/4 acre in surface area. Although this fall my pond is now down about 4ft (still about 8 feet deep) due to the very dry summer and fall.

during the winter, do you run your aerator on a timer daily or are you close enough that you can just turn it on and off as needed. My pond is remote from where I live so I need to come up with something I can do from a timer. How big of an area does your areator open up?

Thanks again for the info.