Thanks for the replies. These Tolumnias are potted in a chunk of coconut husk and fine tree 'twigs'. They are not chunky enough to be called barks.
Here in Indonesia I have been unable to find orchid barks. We only have coconut husk, charcoal, moss and these twigs that comes from what appears to be fern like plants.
They dry out quite quickly and I water them once every two days. When you said that it is overpotted do you mean it has too much media?
Should I remove some of the top media?
Thank you
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