Not tryin to jump on the bandwagon here, but that stand needs some serious bracing before that tank is filled. The sump is a 20g long, yes? If my guess is correct, I'd venture to guess that the main tank is a 75g tank. (48" x 18" x 20" high) The top of the stand should be more like 50" x 20" minimum, and as mellowvision suggested, the top of the stand should not be encased between the sides, but rather on top of them to bear the full compressive strength of the side panels, instead of relying on the strength of the screws/adhesive holding it in place. I'd have at very least a 2x4 cage built inside the frame of that stand, perhaps adding L brackets, and a center support post. That would cause one **** of a mess if the stand gave out while either or both of those tanks were full... please seriously consider strengthening it before filling your tank?
I am not adding ANYTHING else for now until I see what happens to this coral. I'll ask for tank additions and suggestions though as I really want to add COLOR to my tank. BLUE, PINK, ORANGE, BRIGHT YELLOWS. So perhaps some suggestions on what might be good. I do have a coral banded shrimp that is a good size in this tank so it would have to get along with it. That is the only slightly aggressive thing I have in the tank and I do keep him well FED! 
