Here is a tank i setup after reading "Ecology of the Planted Aquarium". Diana Walstad does use some artificial lighting plus natural sunlight.
Its a balance of aquascaping and el natural with soil substrate and pros choice (soilmaster select knock off) as a top layer. No CO2 or ferts added but i do have a water change regimine of 50% every 2wks. Like I said its not really all el natural but more of a low tech and el natural hybrid.