What would you do? Yellow tang aggression

[jtf74]

I've got a yellow tang that in the past without warning just tail swiped another tang I had when it passed by. Now I've got a copperband that is feisty and eating well. The two are currently separated to each side of a 300 gallon with a partition. I have removed the partition periodically and they have met without the tang swiping but just chasing a bit. The CBB stood its ground and raised the top fins a few times but mostly just swims to the other side when the tang approaches. My plan was to add a smaller hippo and a foxface to the copperband side and then remove the partition so the yellow doesn't know who to go after first. The copperband is doing very well eating frozen but I also worry it won't get enough when there are other fish to compete with. My gut tells me to rehome the yellow tang, but I've had it for 3 years and hate to see it go. I love the copperband and feel I'll constantly worry the yellow will out of the blue use that scalpel just when I thought they were getting along, or even on the smaller hippo. The foxface is the largest so a mirror and another yellow fish might occupy the tang and all may be well as planned. Other fish include bicolor angel, pair of maroon clowns, chromis, gramma, banded goby.

 

[lazycouch]

i’ve heard of people using the mirror method or lights off method to resolve aggression issues

 

[Tamberav]

I have a longnose butterfly and a Copperband and I removed my Kole so I could add them without worrying about stress and space. I just like the butterflies more and not a fan of potential bullies.