Freezing weather is a bigger concern, don't want a cracked pipe or pump basket
@FoFa: I was just going to mention that.
At this time of the year I switch my timer around so that the pump comes on about 1am and runs until 7am so I don't have to worry if the temps dip down a bit.  Remember that it's not the water in the pool that's going to freeze first, it's the water in the exposed pipes. 4951