I added him several weeks, maybe a month ago. He has been doing fine. He is "upright" right now but not moving. He is at the bottom, hiding behind the Undergravel water filter tubes.
I don't see any parasites and he isn't "scratching" himself on the gravel
I can't tell if the dark place on his head is the shadow or not
Right now I have a piece of foil dividing the tank because I don't want the pleco to get him and foil is all I have