Hello Farmer Rick,
Typically everything in the pond slows down in the water when temps hit around 50 degrees F. What I mean is that oxygen is not consumed as quickly in colder temperatures and at the same time colder temperatures hold more oxygen.
In your case, I would keep aerating until at least 50 and then back off to 6 hrs a day once temps in the water reach 50. In 4 feet of water and air temps of 47, that might be pretty soon.
I will be driving through AL next week, going from Memphis to Panama City. Where are you located in AL?
