oops my fault! Disregard what I said about 3 or 4 days without water, I was thinking soil for some reason. Hmmm for that thing you're right, 24 hours without might really be a problem. The only thing I can think of is to either make some sort of contraption that will refill the water or get someone you really really trust to do it for you. I definitely would not let those roots go dry for 24 hours though.