AOS is run by orchid people, but I don't know if they check these companies that they endorse on a regular basis. I wouldn't give you 5 cents for the Better-Gro stuff, either. The Schultz mix does have dust, etc. but that rinses right through the first watering. I swear I'm not getting royalties from them, but I have had good luck with it. I add a little chopped sphag to the mix if I have a plant that needs some extra moisture retention.
