I like that idea too.
But we must include the height of the tank, not just the volume.
Back in 1982 I had a 10 gal tank that was only 10 inches tall. With 50 watts of incandescent light, inert gravel full of mulm, and no CO2 I could grow about 15 species of plants. I believe it was the height of the tank that made that possible.
--Nikolay |