powder blue tang

Yesterday I cleaned my sump out, lots of cyano and hair algae, and the back wall (and is quite reflective) of my tank off (and a 15g ish water change of my 90g system. I also mounted a frogspawn frag on a rock with some cyanoacrylate based super glue as to not harm the fish... My PBT has been in...

I had an issue today introducing some new fish and need advice on how I can proceed. I have a 5 ft mixed reef tank that I setup in the fall. I have 4 Tangs of differing species and the biggest fish in the tank is also my favorite one. It's a powder blue tang named Mully after Warriors great...