I've had one in QT for a week. The QT is a 37g with 6 anthias, 2 clowns, and the wrasse, so it's rather "busy." He's out and about most of the time and he's right up chasing food down with the anthias when I put it in there, so it's not like he's timid enough that he's going to starve (I've had fish like that before). The QT is only getting ambient room lighting, so that might be making him more comfortable.