Excellent suggestions: I did this with a hand-squeezed bulb and air tubing jury-rigged for six 2-gallon tanks (big mated angelfish, a piranha, scats, and uncounted guppies) for 3 days cramped into the back seat of a Buick, stopping at night with an actual air pump, and on the road at dawn---it was weeks before my fingers recovered. Everything survived, though. Battery powered pump! What a wonderful invention!