Yea, I do what GrifTheGreat does and just have the tube facing down. Not sure how it would work for a 29 gallon tank, but it fogs up my 10 gallon pretty quickly, so I don't see it fogging a 29 gallon a problem. Maybe someone with a larger tank can weigh in?

GrifTheGreat, do you leave it on all day while at work (like on the minimum setting)? I had bought it thinking of this purpose, but have yet to do so wondering if it is safe- doesn't seem like it would over humidify, but just wondering!