sorry to hear that Robert, I've been quite afraid of that happening to my tank as well, I've been lucky though. No generator, and the power has gone out a few times recently in my neighborhood before I set up this new scape due to all the extremely tall trees and old power-lines exclusive to my neighborhood due to the fact that it was one of the first neighborhoods in my town.
10 or so months ago our power was out for 8 days
and we lost all of our food, if I had a tank at the time it would have been a cube of mud by the time the power came back.
Once again, condolences my friend