I think a gallon a day sounds about right...but I would suggest bumping up the CYA just a little. I'm near Shreveport, so have the same climate as you. I intentionally run mine around 80-90 in order to slow down my chlorine consumption, and this season have been adding the large size WalMart jug (1.4 gallon, I think?) every two days. Might try bumping it up to 60 or so and see if that helps....

Janet