I have to say that with me setting up my first big tank, (big for me at least), reading all these horror stories about tanks breaking is making me re-think the location I was about to set mine up in! We're in a 1 level Ranch styly with a full basement. And I just realized that tha electrical box is directly underneath where the aquarium is! I may need to re-think that one...
So far my only screw up was forgetting to turn the heater back ON after doing a water change in my 29g. Water temp went from 84f to 56f before I noticed it and turned the heater back on! African Cichlids were completely fine for a week, then the largest of the two died overnight. Needless to say I have a electric thermometer with an ALARM on it coming!
But after reading this I'm also going to order one of the 'leak monitors' you can put under your water heaters in the house to notify you if there's a leak to put in my stand next to the wet/dry tank!!!