So this past winter we were hit with a bad ice storm and it knocked out power to most of the province and for some it was hit harder than others. During this time, we only lost power for about 12-14hrs. We instantly put a large blanket on our (at the time) 55 gallon. This happened at night, so the next morning, I took the blanket off to scoop anbd pour the water some to create some surface agitation. Power came back on around noon that day. We lost a total of 6 fish during that week and I associated that to the power lost, so I ended up buying an APC battery backup. At the time, I had the HOB and air pump connected to it and it could basically run like 12hrs like that. Well now, I have two larger tanks with canister filters and bigger air pumps and such, so having all of that plugged in would only run like 45 minutes or something haha. My Question is, what would you want to try power longer? Air pumps or canister filters? One tank is overtocked with cichlids, the other is no way near overstocked with just smaller fish beside one angel... Thoughts?