How long can a tank go without power for? FYI: power outage in Coq, Burnaby and NW

[jus68]

How long can a tank go without airation?

I have a 75gal reef and the power has been out for an hour. I'm not too concern about the temperature but the power is estimated to be back on in 3 hours. So I go buy a battery operated airpump???


For those that live around Coq, Burnaby, New West, here's the area affected:
http://www.bchydro.com/outages/orsMa...utageid=448755