Hi all, this is my first fish tank. I have 2 small clowns very small. They have settled in very well and got through the cycle stage fine eating fine and looking healthy, although one is being very aggressive at the moment and I watched it take a big nip out of the ones anal fin the other day and is constantly taking nips at the other. Is there anything you would do to treat this?or just good food and time will heal it? Thanks in advance