What to add o the tank?

I have HO T5 lighting with 03 true actinic and 10,000k enhanced daylight. The tank depth is 18" and there is 3" of substrate. From light to argonite is 15" and with my base rock and live rock its about 8" or so from the surface to the mantle of the rocks. Ill get some pics and put them up as soon as the batteies recharge

 

Yeah. I have planned a few months down the road a Tek 8X54W set up. I just bought a flower pot and it isn't doing too good. I have it waaayyy up at the top of the tank, but the lighting just sucks. I fear I will have to take it back before I kill it. It is the first time I have overstepped my bounds with lighting. My chili coral is doing well, but it requires no light. Perfect for my set up.;D