It might just be my fish are wierdos but whenever I go into a shop and what people say about Black Redtail Sharks dont get along with each other, Tiger Barbs nip fins...
MINE DONT!!!
I had two red tail black sharks who got along fine - unless one drove the other to suicide(thats why it jumped from the tank maybe ) And my Tiger Barbs are fine with other fish - Looks a very odd shoal though, 2 big'uns and 3 that are about 1/4 the size