Pump run-time in the Central-Texas winter?

[aquarium]

Dunno if anyone is still reading, but I let it go two weeks without a pump run, and other than a collection of small debris on the bottom the pool did fine. I've run it for a few hours over the last couple of days just to clean up a bit, but I'm pretty sure I could have let it go indefinitely until spring arrives. Our electric bill has dropped significantly and I'm going to turn back the summer runtime too.

EDIT: My recent maintenance consisted of adding a little muriatic acid and bleach twice a week (amount based on either testing or prior experience) and then using a leaf net to clean the water surface and to stir the water.