Thank you again, Roberta. Air contact with the roots that are inside the pot must be the reason behind wanting a chunky, lightly packed medium, to allow water and air to flow through. All of my phals are potted in the same bark mixture, except for a few minis that are still in sphagnum moss. I think I will treat all of the phals that are in bark the same, and water when almost dry, or when the roots are silvery green. And thanks for the heads-up about Mini Mark possibly taking time to recover. A couple of the leaves are rather limp, but there are a couple of others that feel rather strong, relatively speaking.
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