Itís very interesting to see the variations.
Being relatively new to the hobby I only have experience with 2x mixes:
The first is straight LFS.
The second is about 2:2:1 (fine Orchid bark:LFS:Perlite).
Although my earliest plants are all in straight LFS I have not been totally thrilled with the 2:2:1 mix so far. *I feel that, much like terracotta pots can do, that the orchid bard is actually pulling some moisture away. *I.e. I am having to water those pots more frequently and the live LFS I placed on top is drying out rather quickly, which dos not happen with straight LFS.
For now any new plants will be going in LFS only, as I also love the look of the pots as the live LFS grows and flows over them. *Plus that lush green look.
I should also note that the couple of Neps I bought already potted were in interesting mixes. *A couple are in what looks like almost pure peat with maybe a little sand. *Its very spongy to the touch and the plants seem quite happy (N. fusca & N. ĎAllardiií).
Another newer plant is in what appears to be coconut husk chips (like Caps mentioned) and maybe some Vermiculite. *This mix looks quite nice and airy yet seems to hold plenty of water as I only have to water as I do for the straight LFS pots.
Here in Australia there is quite a few new coconut husk based products coming onto the market which look quite interesting. *However, my concern is the salt levels. *Anyone know much about if this is an issue or not?
One company called CocoPeat states that there is 87 mg/l of Sodium . *How does that sound? *High or OK?