My power went out the other day for around 2 hours or so and, I scrAmbled to get battery operated air pumps running for 13 tanks. They estimated the time being around 6 hours till power was restored. I was lucky and it came back on after two. I don't want to get a generator I live in an Apartment and gas is thru the roof anyways. Is there a way to mod the battery powered diaphragm air pumps to run off dry cell batteries? My idea is to put back UPS under each tank so when power goes out I can hook up the tubes to the back ups and turn them on. Has anybody got any ideas. Looking for a relatively cheap solution.