We've been suffering below zero temps since yesterday here in the middle of Misery.

I glanced at the pond long enough to see that there's air coming out of the diffuser and maintaining a section of open water.

I got to the livestock fountain just before it locked up this morning. Those things are generally trouble free in cold weather if you have enough critters using them to keep them open. Three horses don't drink enough water to do that so I have to help it out every now and then.