I just bought a 4" Unicorn Tang and put him in my 120 Gallon Tank. The only other inhabitants are a small six-line wrasse, a scooter blenny, and a really small Yellow Tang. It doesn't look like he's doing so well. I put him in there last night and he seemed fine, but today he frequently has that camoflauged color and he doesn't seem to be moving around much. Is this just part of the acclimation process? My water parameters are good. Thanks for any feedback.