I havent give this a try yet , but a friend mentioned to me about saving
old cattleya potting media , re-sterilizing it and using in paph
mix...Hmmmm

I reuse Aliflor and the rock I use for Catts, after an overnight chlorine
soak and then a thorough rinse. Bark or CHC, when they come out of the old
pot, are basically shot. The mulch suggestions are good ones.

Diana