I really need help with my Copperband Butterflyfish. I recently purchased it about three days ago. On day one he was not eating, it was only in the evening when I fed it frozen artemia, marine mix, and mussel meat cubes did he eat. On day two; he was eating but it looks like he was not 'fighting for it'. Now it is day three, and he is not eating at all, I have a Picasso triggerfish and Vagabond butterflyfish in it and they are eating perfectly fine, I feel like he is stressed. I really do not know what to feed him now. I feel like I have fed him everything I possibly can. Please help