Looking to add 1-2 butterflies to our tank in the future (it's still fairly new, so this is more of a future planning question than a "I'm going to buy them tomorrow" question). Tank is six feet long (125 gallons) mixed reef w/ a dedicated sump plumbed into a DIY 10 gallon refugium (for pod production and nutrient export). Planning to keep mostly LPS and easy SPS, along with some gorgonians.
Stocking is currently just 2 ocellaris, with a red firefish, engineer "goby", and orange stripe prawn goby as the next QT batch.
Planning to later add a royal gramma, melanurus wrasse, some lyretail anthias, tomini tang, and longnose hawkfish.
In an ideal scenario, we'd love to add a copperband and a yellow longnose (flavissimus). I recognize these are both hit or miss depending on sourcing, plus they can be tricky to get feeding. I'd like to add them earlier on in the stocking list to give them a better chance at establishing good feeding habits with less competition.
When the time comes, is it better to add both to QT simultaneously, or would it be too stressful for them to be quarantined together? In the latter case, since the yellow longnose is more peaceful (as per the aggression chart in this thread), would it be better to add the longnose first? Realistically, which of these species tends to take feeding training better?
Do you agree with adding these earlier on in the list?
I'm keeping a few others in mind as "falback" options in case one or both of the above species don't work. Just being realistic. Looking at Heniochus diphreutes (fits well with my mostly planktivorous feeding guild) or Chaetodon kleinii, as I've heard both adapt to captivity better than the CBB and longnose.
Thanks in advance!