Another factor to consider is temperature. As the temperature drops, water's affinity for oxygen rises. So, cool water holds more oxygen. With shorter days and longer nights, you have less photosynthesis and more respiration. But, my experience suggests you shouldn't have much concern about oxygen depletion...for several reasons.
First, as temperatures drop, so does oxygen demand by living organisms. In other words, fish don't require as much oxygen...neither do most other critters with metabolic rates.
Second, with a higher affinity for oxygen, the risk of a fatal drop in oxygen is seriously minimalized...not likely to have a fish kill due to low oxygen in east Texas this time of year.
It is wise to continue to monitor visibility and I agree to confer with Bill Cody to identify what you have to project what to expect in late February or March, when water temperatures begin their spring rise there.


Teach a man to grow fish...
He can teach to catch fish...