Hmm, okay thanks - I may try to leave it alone for a bit, and if it continues to lose color, I'll move it up. I'm not 100% positive it's a green slimer, that's just what AG sold it to me as.

When I got it it was green/brown in color with brown polyps, and now it's mostly a tan color.
My other corals seem to be holding color okay, so I'm not sure why this one isn't.