I don't think my pleco has any disease yet but I was moving some stuff around in my aquarium to make room for a new cave. I didn't see my pleco in one of the caves I was moving and I just looked at him and he has at least one scrape on his head, he's very shy so I couldn't get a really good look. Is there anything I can, or should do or will it heal itself? I feel really bad now, so any help is appreciated.