I have a 450g tank with about 380 lbs of LR
. I have an Atlantic Blue Angel (I think that is the proper name, I'll attach a pic) that has lost much of its color and his fins are getting ragged looking. He no longer seems to be eating and just hangs in the lower back corner of the tank.
I am not sure if he is just deficient in some important nutrient specific to Angels or if there is a pathogen involved.
Other thriving fish in the tank include: a Yellow Tang, Lunare Wrasse, Foxface Lo, Mono, Snowflake Eel.
My question is twofold:
Does my description of the problem sound like diet and stress or pathogenic?
Since the tank is so large with a good amount of rok it will be hard to get him out. I do have a cycled 29g QT that I could put him in. My thought is if he is not eating now, why would he in the QT?
I'll attach a pic from when he was very healthy. Sorry I could not get a good shot from where he is situated currently.