Couldn't wait any longer, so I went out and got a 20XH and would like
to plant it. Want to start out low tech (read: no CO2) and wonder if
anyone has a suggestion as to how much light I should put over it for
that. The hitch is the depth, about 24" from the bottom to the glass
hood. With 4" gravel, I'm looking at 20" of water, and don't know how
the depth factors into the light requirement.

Any suggestions?
thanks-

James