That's one way to do it lol! Back in the day I had to transfer a yellow tang and a foxface 6 hours from my friends house to my house. Had 2 buckets, one with the fish, and one with fresh saltwater. Used a battery operated air pump with an extra set of batteries to keep oxygenation up. Half way through the trip, transfered them into the new saltwater bucket. Both made it alive and well, but looks like this would work too! Only issue is any bugs making it down the tube lol