When I bought them the threesome was already established and order was set. The female takes out her anger on the male who then takes out his anger on the little guy. Some species will let you get away with threesomes in a tank like Skunks, Ocellaris, Perculas, but would never work with some of the meaner clowns. I'll pay close attention to the behavior and if it looks like threes a crowd then one will have to go. When I woke up this morning all three were sharing the same bed.