My three are in a 750 gallon tank with eight very large viejas, a 30 inch chile/red arowana, boucorti,carpinties,orantums,L-25,and a large albino pleco. They get along with everyone (not a scale missing) but they stay away from the aro. Also they eat everything from peas to pellets to worms,prawns and algae wafers, funny thing is that my aro eats everything too. Lots of competition for food.
The larger two are pushing 12 inches. I'm curious how big they will get......
I have some time off next week so I will try to post pic's.