So your tank is 72"X24"X24" and using a sump and overflow right? what pump/ flow rate are you using on this tank? Are there added powerheads to help with circulation or just the sump flow?
Did you modify your sump to be better suited for a plante dtank, or just used the sump as is and changed the materials inside?
I remember reading you had MH and PC lights on your tank of 1500watts, and you were going to downgrade to 250 or 150 MH and PC lights, what made you change your mind?