My female Oscellaris Clownfish has been in my tank for a couple of years. I recently added a Bicolor Angelfish and the Clown took to continually harassing the Angelfish. So, the Clown is now in my sump. I'm guessing that if I leave the Clown in the sump long enough, the Angelfish will get established and the Clown will effectively become the newcomer. Am I right in that assumption? How long should the Clown remain in the sump?