So I went to the LFS and wanted to get a pleco. So I see they have all commons but one in a floater. She says its a zebra pleco and is by itself because somone traded him in. She also said he really stressed and thats why theyre trying to keep him isolated. So I bought him for $3 and put him in. It seems like hes paralized. Hes breathing but can move. I can pick him up and turn him over on his back and he wont correct himself. Whats going on? Is this stress or somthing else?