Well I don't know if this is going to sit well, but no, do not aerate. You have a very small stock tank. Don't buy a feeder, don't aerate. They will only add to your problems.
You will understand sooner or later. Sadly some lessons just have to be learned the hard way.
Best of luck.
Oh, and when you have to restock, call Todd at Overton's. He is a better teacher than I am.
Again, best of luck, let us know how it goes.
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