I just started my aquarium a few weeks ago. I let it cycle for a bit before adding my fish. I picked up a goldfish a couple days ago and decided to add a fantail calico. When I added him in the tank the goldfish immediately started chasing him. He's been chasing him for a couple hours and I wanted to know if that's normal? I've read up about the pecking order and stuff. How long should they do that before I draw a line?