Hi, I am a new member here but have raised fish for many years. I recently bought some black fresh water angels and seems to have a slight problem I hope. I have two previously from the same store, and they were doing great. Now they all hang out near the top of my tank, and keep their fins tightly closed. I have a 125 gal. tank that has been set up for years. As of this morning they eat and seems to be hungry. I have checked the ph levels, and ammonia, they are in order. Should I be concerned
