Powers out what to do?

[Snaz]

The battery operated air pumps are noisy as heck but do a great job keeping an aquarium aerated during a power outage. Everyone should have one.

[DanG]

I've got an APC 1300VA hooked up to my MP40, it's good for about 4 hours as long as I turn the speed down, I've also got an APC 550VA that's running a koralia 900gph pump.

Costco has super cheap prices on these UPS's, and for what I've got invested in my tank, it's cheap insurance.