I acquired an Asfur Angelfish (Arabian) that originates from the Red Sea. I have a 45 gallon tank now but he was in a 125 gallon. I am in the process of putting the 125 up. I have had him about a week. Originally he was shy and hiding in all of my rock . Now he paces the tank constantly. I know he needs more swimming room. All of my other fish seem to be less active since he has become more active and now I think my Kole Tang is dying. Could the Asfur be the cause of it or is it just a coincidence? I have no where else to put him other than taking him to a lfs
. I don't want to lose my other fish because of a beautiful free fish.