I have a 10g planted tank. There is no filter, no air pump, no ferts, and no Co2 added at all.
All it has is a small school of guppies for Co2 and Ammonia, medium lights, a circulation pump, and some small snails for algae control.
The plants I have growing in there are thriving, as they're low-light mosses and med-light carpeting plants. I rarely ever do anything to this tank, as it's really just a tank I use for growing undemanding plants like mosses.
I think you are trying to accomplish the same set up I am? If so, I can walk you step by step with everything you need to know.