I've been growing for about 2 months in s/h. I use the 6 inch tall plastic containers, holes a bit over an inch from the bottoms, using LECA clay. I have a few phrags, an enc, an epi, a phal, a cochleanthes, and a miltoniopsis. So far, all is well. I notice that my pots inside tend to need watering every 2 to 3 days, outside they can got a bit longer. Nonetheless, I tend to water my outside s/h every 2 days for the phrags, and every 3 for the others, just to keep the water fresh. Fertilizer weakly one a week or so. Really, nothing more than that. The two phrags do seem to have taken off the most quickly, though the other are holding their own so only time will tell.
Oh, and I am starting to get some algae, and worse, noticed some mold or something growing a few weeks ago - now I'm more persistent with using Physan every once in a while as a preventative for at least the moldy stuff.