Yes, I’ve found they have a lot of intraspecies competition if kept in groups smaller than 5, they would always pick on eachother so I ended up keeping my favorite. I do plan to have a tank full of scats some day though
Now that they are bigger, and know what these food fish mean they strip them to the bone in a matter of seconds. Eat everything including the eyes. They have small little mouths, so I am surprised at the quick work they do. I have kept red belly piranhas before too, and the RBPs would have serious competition with these guys haha. They practically jump into my hand when I open my lids now. Honestly some of my favorite fish I ever kept. Very personable too.