not sure exactly what coral you're referring to. Is it a staghorn?
At any rate, coloration is based on so many factors and parameters. Many corals can become brown and drab if sufficient conditions aren't met.
When the lights go off at night - maybe an hour or so after switching off - do you see the polyps coming out? This is a good indication to me that the coral is actively feeding.
So...here's some parameters that can affect coral coloration:
- flow (more likely lack thereof)
- excess nutrients, such as nitrates/phosphates
- calcium and alkalinity (how are your parameters now?)
- magnesium levels
- potassium levels (I've found this to play a huge role in coral colors, especially the blue tones. I bet if you measured your levels, you would find that they are WAY too low. Since I began dosing last fall, many of my corals have gone from a drab brown to a spectacular blue/purple!
- iron has also been shown to increase green coloration!
Bookmarks