Well, some people is using perlite mix, (see this http://www.slippertalk.com/forum/showthread.php?t=5435) and some will tied it on a tree bark. Mine?,... hemm still diffcult to maintain the growth on a piece of wood bark. Perhaps to try on perlite and some mix of paddy husks.
Picture courtesy of khairimd.
http://oapm.proboards52.com/index.cgi?action=display&board=photos&thread=1204009005&page=1
