Nobody's addressed this yet, so let me tell you something that you probably never really thought about...
Your
Max tenuifolia is rotting for a reason. I can guarantee you that it isn't because the initial cause of the problem was the disease organism, because it isn't.
The root, (
no pun intended,
), of your problem is exactly what I just mentioned - it's the roots, they're doing poorly. They are most likely suffocating from the pot that is too large for your orchid. Here's what I mean:
Pot size too large for the orchid = large amount of potting media compared to the root mass, (and in your case the potting media is a mix of CHC and Sphagnum moss) = high water retention from the plentiful CHC & Sphagnum moss = lower air circulation to the roots = roots dry out much too slow = roots suffocate and root cells start to burst from too much water, causing death of root cells = dead root cells provide a breeding ground for pathogenic microorganisms = root rot = stresses the plant out = lowering the plant's defenses against the disease causing agents = more pathogenic microorganisms proliferate = stressing the plant out further = further lowering the plant's defenses against disease organisms = rotting of the pseudobulbs themselves.
As you can see, if you don't take care of the real problem, you're only going to fix things on a "cosmetic" level. If the true problem is not addressed, later down the line, one or more pseudobulbs are going to rot, and you're going to continue wondering what's happening to your plant when so many people are saying that this species is tough as nails.
I highly recommend changing the pot size to something that is only 2" x 2" x 2" in dimensions. Anything larger than this, is already way too large for your
Max tenuifolia.
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