Naviaras
The misters don't need to run long but they need to run quite often becaus
the roots that hang in mud air will dry out if not. You want humidity. The humidity itself wont cause anything to grow a food source, warm temperatures, and/or light will. You want to light proof the system, and hopefully your
nutrient temperature will not be to high because the
nutrients will provide a food source. But without moisture, the roots will dry out and plants will die.
RKFM
Thanks for the link, that looks like an interesting setup.