| That is how UPS works. But, like Rob said, you would need a pretty big one to power your whole aquarium for any length of time. The UPS units people usually have on a home or office computer cost around $100 and are mostly designed to allow you to save what you are working on and shut down your computer. Obviously, a bubbler would use less energy than a computer so you would have a longer run time. When I worked in a lab we had big UPS's that would allow us to complete tests we were running and lasted several hours. But they cost thousands of dollars.
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