Adding a McCosker's?

[2Plus2]

Hiya everyone, can you all please give me some input?

I run a small 42 gallon tank with tons of rock work.

I want to add my 3rd wrasse, I currently have 1 possum and 1 pink streaked and they're peaceful.

Will adding a McCosker ruin the peace & harmony in the tank.

I have a few small gobies and a pair of clowns.

 

[jonelder68]

Just purchased an acclimation box. I’d suggest getting one as well. Add wrasse and see how tank reacts. When/if they ignore it while in acclimation box (2-3 days usually) release into tank.