So I just picked up 3 cherry barbs and one of them has me a little sketched out. It’s hiding unlike the other two and has something glazed over it’s right eye— I noticed it right when I put it in the tank and put it in a small quarantine tank to look more closely- put a few pictures below. It has what looks like a scuff mark on one side of its body so im thinking it’s maybe an injury. Help would be appreciated! Should I return him or put him back in the main tank?