I've read the stories about super-chilled air and fish kills, and am wondering what to do here in Athens GA. (Avg Jan high 54, lo 33)

Don't really expect much freezing. A couple years ago the pond froze over for a week straight. That's about the worst of it.

So, do I shorten my compressor run time, which, actually, I have already done? Do I alter the run time to a different daypart? (currently running midnight-6 AM)

It's a half-acre pond, 4' average depth, 7' at its deepest.

Thanks for the insight.

Mark