Hi dbizal,

You are absolutely correct. I currently have 1 terrestrial and numerous ephyphytic orchids in my tank. They would surely perish without adequate ventilation. In nature they regularly experience periods of being wet then drying out. If you decide to put in Justin's ductwork system, please let me know how it works for you. You are wise to consider this prior to your actual tank build.
take care and good luck to you,

judy