Sorry if I came off a bit too salty, not my intent. Just very easy to have a stocking mishap and they’re in, it’s too late. Personal experience: i had my son pickup fish for me and stock them. Fish guy gave him LMB instead of HBG. I told son to take a pic of them before releasing in pond, he did but future daughter in law released them before I could look at pics. I would have caught mistake, but was too cheap to take a day off to do it myself. $30,000 pond project took a right turn into the ditch because I thought it would be easier this way.

My advise would be better stated as: measure twice cut once. Some pond actions are costly or very hard to undo. Wrong fish is one of them.