120gal mixed predatory reef tank

[whatcaneyedo]

I just came home to a dead Copperbanded Butterflyfish tonight. I've had it since the fall of 2008... it was always a very active fish and ate readily 3 times every day. These pictures were taken just last week. I have no idea why it died but I've since done a water change and placed some fresh carbon in the reactor. The last new additions to the tank were a Flame Angel and a Mandarin Dragonet back in the spring (June I think).