I recently picked up a banded butterfly pleco from my LPS and over the past few days figured he was fine. I have noticed though his eyes are now starting to sink into his head. His poop is the normal green no white or clear, but I am not sure that he is eating. He is in a cycled tank not sure what the water parameters are aside from the temp being held at 76-77. I also have hillstream loaches in the tank and i hear they are more a problem with water quality and they are fine and healthy for almost a year. Could it be stress related and if so what can i do. I added an air stone and other things to the mix. I am also treating for bacterial infection because i hear that is a common problem. Someone please help I don't want to lose him. My luck with plecos has been horrible lately. Not all in the same tank of course. thanks.