I have one pbass with 3 gars, the problem that I have is getting food to the gars. The pbass is such a pig, and when he sees a gar going for some food he will rush up and get it before they can or if they get the food he will steal it from them. I would avoid the situation. After a couple of weeks, I figured out how to fix the situation, but the gars had to start accepting food that sank to the bottom of the tank, and then eat it there.