Which size to order

[Awesome Opossum]

Im about to swap from a 75 to a 180. Once the tank is running for a month or ao, I will be adding a copperband butterfly and blonde naso. I wanted to order from Fish Hotel but Dierks doesn't do these two fish. Im looking at Dr Reef which I will definitely place their fish in an observation tank. The naso it looks like it can get in 2.5-3.75" which is about the size of my other tangs. The copperband comes in 1-3" or 3-5". My tangs and foxface are in 3-4" range. My tomini is the smallest at 2.5"+/-. Which size butterfly would you recommend?

 

[1ocean]

bigger CB better chance to survive...the shipping..

 

[Awesome Opossum]

Do you think adding a fish larger than the tangs would start any drama? Or are the different looking enough to not be aggressive towards each other? Im considering getting rid of the tomini when I swap systems. He is the most aggressive fish in there. The powder brown wont stand for it so he doesn't bother him, but the tomini is think can be an "instigator".