If i'm you, i will ditch the tri-colour. IMO, they are one of the most agrssive anthias you can have.
I used to have 1 which killed a lot of my other anthias.
I trapped it and give to LFS to re-sell. Nice colour thou.
Anthias of the same shape tend to be more aggressive as they are very close to the basslet family.
Meaning they are "predator" by nature.