Originally Posted by longyi

Your xb being attacked by the red, then move out to another new tank.......all this is stress and new enviroment for the xb.

Let the xb get use to new tank enviroment become less stress and stable, very soon it will start to eat again.

It is a good sign that you mentioned the xb is swimming actively, water condition is good which is all good news, no problem to keep the black oyama glass wall as this has nothing to do with the xb feeding habit.