A friend who is moving just gave me some ultraviolet resistant bird netting he used for his fruit trees. I don't like to use this in the garden because reptiles get stuck in it. I'm going to try and make a LECA bundle with this stuff holding it together and plant an orchid in it to see what happens.
I can tell you what will happen: you're going to be watering your ass off!
I have a few phals that I've~ adopted in the office potted solely in LECA. It sits on a window, I've pretty much water it every morning when I come in. It seems to grow just fine, one of them is in spike now. See pic below
Depend on your growing condition, I live in SoCal, humidity is low. Anyways, like the above stated, you never know until you give it a try.