Suggestion on a power backup system

[ALang]

Hi,
We seen to have a few power failures every year. Most of the time the power will come back on in 30 minutes. I have those little battery-powered air pumps set up, but noticed that they don't really create any significant curent, etc...
Am worried that if the power goes off for longer than 30 minutes without me being here to monitor the situation, things will start to die off.
So I am asking for everyone's input as to what you do to prevent this from simple power outage turning into a disaster. Where can you find the power backup that you are currently using? And can those being used by computers be any good, as I don't think that they will last for long?
Would you just plug a few powerheads in to keep the current running, or do you plug in your reutrn pumps as well?? Thanks.