Yea, I've been wondering about DSM with moss.... I figured it'd be like every other DSM method for HC, UG, DHG, etc. Curious to see how this works out for you :biggrin:
I'd probably double your lighting since you don't have to worry about algae in a non-filled tank.
And yea, definitely don't waste CO2 of any kind on this tank, it's not even filled! Open up the corner of the saran wrap for a few minutes each day to let the air vent a bit.