So yesterday I went to a labor day sale at the lfs and picked up three zoa frags and a one spot foxface. I brought him home and floated the bag with the lights off for 15 mins, then drip acclimate for 1 hour. When I put him in the tank he sorta layer on a rock for a minute then found a cave and hid in there. He stayed hidden in there and I left the t5 lights off and had the blue moonlight LEDs on. Came home about 6 hours later and he was lying in the corner of the tank and was his stressed colors (brownish). I turned the lights on to get a better look and he stayed there but perked up his spines some, shut the lights off and came back 10 mins later and he was gone, guessing he went back in the cave. Is this normal for a foxface? I've read they change to dark colors when stressed or at night. I'm at work all day today and won't be home until tomorrow morning so hopefully he is doing better.