Henry Bubkis wrote:
Has anyone done this before?

I'm inheriting a large fishtank that I want to turn into a terrarium and
would like to combine some of my tropical pitcher plants as well as other
tropical plants and african violets with the orchids in a natural setting
terrarium.

Are there any problems ....

You bet. The vast majority of orchids require good ventilation and
excellent drainage.

J. Del Col