In my neighborhood, power goes out from time to time. It may be a few minutes, or an hour. About two or three times a year, it will go out for a longer period of time, which is precisely why I own a generator. I've written about how it is used, as well as good maintenance tips for long term use. Here's the full write up: http://www.reefaddicts.com/content.p...tect-your-reef There are a few drawbacks to using a generator. Fumes ...