If you can manage a heavy mist, that would be excellent. And you can run it every day,2-5 minutes. Mounted plants dry very fast. You truly can't overwater a mounted plant.
I think mine are like 2 gallons per hour or something like that. Been so long since I got them I don't remember. I don't think it matters much... use whatever you can easily get, if they don't get soaked in 2 minutes, run them for 3...