northtexasfossilguy

In case the power goes off for an extended period of time, I don't want to lose my animals to lack of oxygen. So I was thinking either battery powered air stones in each tank or power for the filters.

Has anyone done any projects like this? I would be interested to know the setup and idea behind it, how you could automatically detect a loss of power and after say thirty minutes trigger airstones to turn on and run down batteries. Or powerheads might be a better deal? I'm not sure which uses less power. I personally want to shoot for about two days running time with a system like this.

How long can fish survive without a tank with filters running?
How long can they go comfortably without the filters running?
How long will the bacterial colony survive if a filter stops working?
Would a twice daily 25-50% water change every day suffice for a couple days time to keep the oxygen in the water or not?
Do plants keep the water oxygenated enough in case the power goes off for a day?