Any ideas on some medium sized fish that school for my chocolate cichlid tank? Have a 90 gallon that is home to my 6 inch male Chocolate and a 4 inch green Severum. Want to add some activity to the tank. I know that Chocolates are pigs and don't want to ad a school that will disappear overnight. Severum was in another tank with smaller fish no problems at all. Any ideas on a peaceful group would be appreciated!