I agree with everyone else. I love my sixline, but he is so aggressive to the other fish. He was fine when I got him, but not that he is growing, he goes around and picks on other fish at random. I just tried adding a beautiful whitetail pygmy angel, but the six line almost tore her apart. I just caught the sixline and he is in a plastic container in the tank for now. I think I may put him in my sump for a few weeks while the angel gets settled. I don't want to get rid of the fish, but he causes so many problems. Now, on the contrary, my dad has a sixline in a 55 with a damsel and flame angel, and they are all very peaceful.
Bryan