I recommend one feeder for every three acres. Fish will average consuming 3% of their body weight of feed daily, over a 200-250 day growing season. Some days they eat more, some days they eat less.
If you feed 3 pounds of feed per acre to fish which convert at 2 to 1, that means you will feed 600-750 pounds of feed per acre per year. That extrapolates to 300-375 additional pounds of fish per acre per year. Cost is about $180-250.00 per year for feed, if you are "supplementing" your fish population.
A mature fish population will eat much more feed than 3-5 pounds per acre per day, but you don't need to feed any more than that unless you have a specific reason.
In regard to temperature, some fish, such as bluegill, will feed well into the mid-40's and most warm water fish tone their feeding down when the temperature rises into the upper 80's and 90's.
Now, with that advice, use it as you wish. I have seen 70 acre lakes with two feeders feeding localized populations of fish. The feeder's job there is to attract fish for people to catch and to see more than to actually grow more fish.
Tell me more about your goals in NC and what you are doing. I go to the Raleigh area once a month, heading to Laurinburg.
