So this weekend went to LFS, and my 9 year old daughter picked out a Blue Damsel for the tank. I HATE him. These few days all ive seen him do is bully my goby and clowns. He is to fast for me to net with my rock work. He just darts into it and stays there. I tried to block his entrance with the net and he just finds other ways out. Do I need to break down my rock work? Please I need help. I want him out of my tank!