There are articles online about "vase" culture for the smaller Vanda types, such as Ascocenda. You basically set the plant on top of a clear glass vase, letting the roots hang into the vase. A few times a week you fill the vase, allowing the water to sit for a few minutes, then drain the water back out. I have never tried this, but have heard other members say it works great for them, when growing the Vanda types indoors.