Anything is possible but from what I have seen I would not risk going that route, why not just get another fish instead of trying? If you do try it, you should have a backup plan in case you have to move one. I also think a 125 is not that large. If you have tons of open rock/hidding spaces it may greaten your chance for success giving your tank more areas to roam. Were you thinking Hawaiian Bluespot and Valentini?