Our second project was a dome in a house. Because of the condense due the cold outside and heath inside there was a lot of water coming down, resulting in mold.
Our solution: Installation of plantgutters underneath the dome. In these gutters we collect the water from the dome for the plants. It's still necessary to give the plants extra water, but you can catch also the condense. The hole thing is hided with white plastic plates for a nice view.