With my Cyno being replaced by coralline, and my tank's inhabitants being happy, I was considering getting either a sixline or a flasher wrasse for my 29 Biocube. However, I have a tank full of pacifists (Yasha Goby, Fire Fish, Bangaii Cardinal, and a Scooter blenny), and I was afraid that the sixline could torment them, and the flasher could scare them with his active swimming. While the Scooter blenny eats plenty of frozen, I also don't want the sixline to compete with him for the pods in the tank.
Does anyone have any thoughts or suggestions? I don't want to mentally scar all my pacifist fish by adding something that would be mean to them.
I also do not want any cryptic fish please. I already have plenty of things that hide in holes, I don't need another.