I'm fascinated with this closed setup and I'm doing the same with a few different species starting with an Ang distichum in a closed 99% rh container.
I have a fan to incorporate but it seems to be doing so well currently that am apprehensive to change anything so may start another vivarium. I really like this option for the smaller plants that don't like the greenhouse or need constant 20c and high humidity and am going to experiment further.
I moved it to a larger jar, a huge hurricane glass. Its roommates are two plants from Ecuagenera I received in July: Pleurothallis ruscifolia, which will probably survive, and Pleurothallis niveoglobula, which dropped all its leaves in the first month and is probably dead.
__________________ May the bridges I've burned light my way.