..............at least according to my local paper.
"Drain swimming pool circulation systems or keep the pump motor running. (Run the pump motor only in a short freeze. Running the motor for long periods could damage it.)
I'm guessing the local paper had contacted a local builder or pool supply place for this LESS than sage advice.
But it was in print in the paper-----It MUST be true! (must be some hidden danger in circulating that colder water I've been unaware of for 5 years now.)