Power is out

[Dearth]

Very least you can buy a battery powered bubbler or three with airstones to help oxygenate the water.

You can also buy a UPS from any computer or electronics store buy the biggest you can afford just remember you are repurposing something for office use to SW use and battery life will drain considerably faster than powering a computer. Recommend that this be reserved for powerheads only.

If your worried about heat loss cover your tank in a couple of blankets to retain heat longer

And of course the biggie a generator