I like the rovckwork
...but a few questions. You said you set this up two weeks ago...did you allow it to cycle or did you just add corals?
As for a refugium, that is personal choice..some people use them, others don't. I am one of the don't crowd just because I have never had luck with them. I use the media basket and, in order of material, place filter floss, Purigen and Chemi-pure elite.
Is that a heater in the back corner? Nanocubes have an area for the heater in the filter area...just to the right of the inflow (as you are looking at the tank from the front).