Shh. Don't let my parvis hear you:> Probably 1/3 of my paphs are parvis.Someone told me Parvis hate s/h.
I've got a several different types of leca and have been growing in s/h for probably going on 3 years now. I use the old prime agra, hydroton and aliflor. The hydroton and aliflor are available here locally so I have most of my other orchids in those. I have potted some of my paphs in aliflor or hydroton if I'm out of primeagra. I prefer the prime agra for my paphs, and luckily have enough to sterilze and reuse for right now. I haven't tried the new prime agra.Do I see different SH medium ? Do you prefer one medium over the other...algae bother you ? How long have you been a SH dominatrix ?