Diary of a Mad Natural Historian Orchid nano-viv
IF you see the designs, they seem to water almost perfectly for different orchids n all. Just an idea i think could be cool, those dont allow actual penetration either, but seem to work great for them. Just a thought, may get surprising responses. My next project is a Clay Background similar to the one you posted before, I am going to track down some redart clay and Calcium bentonite if i can find it.