http://www.youtube.com/watch?v=7gu1zCFUELs
I bought these Copperbands about 3 weeks ago and put them into my refugium tank. Almost immediately, one started chasing the other, and I had to separate them with this divider. That seemed to solve the problem. I got them both eating, and everything seemed fine. In fact, I was just about to try removing the divider again to see if they might get along. Then today I see them trying to fight each other through the divider. And it is Valentine's day, too, Feb 14, 2011.
Reef Pilot