Same issue for me with the chromis school...I never could manage to keep a school of these fish so I stopped trying.
how is it the pet shop can keep 50 of them in a twenty gallon aquarium and they seem to get along fine and when you put three of them in a hundred gallon tank they kill each other? is the pet shop feeding them magic brownies?
They aren't in the tank long enough to establish a hierarchy, plus I'm sure plenty die but are just removed.
how is it the pet shop can keep 50 of them in a twenty gallon aquarium and they seem to get along fine and when you put three of them in a hundred gallon tank they kill each other? is the pet shop feeding them magic brownies?