Pink spotted watchman goby aggression

[Aspiring Tank Guru]

So I have a 3-4" pink spotted watchman goby in QT (20 gal.) right now ready to go into the DT (55 gal.). My concern is that he was aggressive with a purple firefish that was in the QT with him (the firefish is now in the DT). In addition to the firefish, I am also concerned about my 2" hi fin red banded goby. Does anyone have any thoughts on whether or not the pink spotted goby will be a problem? My hope is that since it is much bigger than the QT that everything will be alright but I am not sure if anyone else has had experience with pink spotted watchman gobies.

Thanks!

 

[Cory]

I think in a bigger tank they will be better. But once a fish gets a taste for bullying they usually dont stop.