Photosynthetic gorgs are relatively easy to keep, they require lots of light and good water movement. The DT's should help also, but there is some debate as to whether the DT's is feeding the coral, or if it's feeding what the corals eat. With such a small system, I must reiterate (what I've told you via IM) be careful with it, the DT's is live, but can easily cause pest algae problems.