The combination of the fish loss last fall when I was away, coupled with some slowly creeping problems made it my best choice.
1. The foxface that died was keeping the caualerpa in check. It is out of control again.
2. The Chelmon marginalis that died was keeping aiptasia in check. Not a problem yet, but likely only a matter of time.
3. Vermitid snails have taken over. Thousands of them everywhere. Makes the nice coralline covered rock and glass turn brown with accumulated stuff on them.
4. The electricity cost is hard to justify for the way the tank currently looked.
So the choice was to invest big and fix the problems, or take it down. For various other reasons, I decided taking it down with the option to maybe restart sometime in the future was the best option.