You might not have to stock Bluegills. By taking a lot of the smaller bass out, that will allow more of the offspring of the spawning bluegills to survive and grow. With it being an artesian spring feeding it, there won't be much nutrients in there, so it might be a good idea to get the bluegills on a supplemental feeding program so they can reproduce more.
Texas Hunter Feeder, Optimal Bluegill food. 5 acres, you could use 2 feeders. You would be (most likely) feeding 3 bags per month between the 2 feeders once the Bluegill get with the supplemental feeding program.
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