Yellow Pyramid Butterfly question

My 3 are fat boys and have grown alot in the 2.5yrs I've had them.

John--do you observe them chasing each other in a spiral motion and/or interlocking their dorsal fins at a 90* angle at dusk? I just wonder if this is a mating dance or a duel:lol:

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At this point, I'd try prazipro or an antibiotic like metronidazole... and see if you can clear them of something internal, at which point they may want to eat something.
 
Have you tried live blackworms? That was the only thing that triggered a feeding response in my Copperband Butterflyfish.
 
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