impala;4764840; said:They are a popular combo, but I'd recommend either 1 or a few, 3-4 due to aggression issues.
With two the dominant one will bully and stress the other one out to the point of getting very little food, staying small and in extreme cases stop eating and die. With more of them the aggression is spread around and they can all thrive.
For size I would advise buying the dats smaller than your rtg. Good luck.