"Bill Stock" wrote in message
...
Mine is actually under the cover, which seemed like a good idea at the
time. It keeps the air pump warm, so there is less chance of the diaphram
freezing/cracking. But the boundry between warm air under the cover and
cooler air above the cover is causing serious condensation on the pump.
So far it has not killed it, but it was soaking wet this morning.

I guess I had not considered the possibility of the pump under the cover.

One of the other suggestions often made to keep bad gasses from developing