Billy,
Nice to have some more middle Tennessee guys on here. I'm near Lewisburg, about an hour south of Nashville.
I've heard either Bob Lusk or Greg Grimes say that threadfins will make it 3 out of 5 winters in our zone. It might really depend on the pond. I have a 3/4 acre heavily spring fed(in the winter) pond. Water temps never got below 39 surface temp last year. However, several ponds near mine froze over for a time. I assume mine stays warmer due to the 55 degree heavy inflow.
