Well already there is definite hierarchy.
One stays high in the tank, one stays off to one side about 3/4 of the way down and the third hangs out near a pvc fitting opening.
I like how these guys are out in the open and not afraid.
I have a trio of male McCosker's in my 55 and mine get along fine. They were all the same size when I got them and they all went into the tank together. One is definitely more dominant but he's not a bully- he's bigger, and has better color as well.
I did the same thing a few years back....ordered 1 male, 2 juvenile/females from LA. Got a trio of three males! One didn't make it, the other two fought like the dickens until I separated them. Good luck with your remaining two!
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