All,
When I get back to Texas. I'll test as well. As of Friday, my surface temps were still in the low to mid 60's so I would expect to still have a thermal cline at 12 to 14 feet. There has been some extra wind this fall and one or two cold snaps, so who knows. I did test once last year during the winter, But I don't have that data handy. As I recall, I still had a thermal cline, but I can't remember how deep it was. At that time, our water was still warm to remain unmixed.