It was bought about year ago in supermarket on sale in a rather poor condition.
Then it was repotted to good quality bark. Then it has been growing well for almost a whole year. The growth point was damaged, but a lateral shoot began to grow. Watering once a week with boiled water. Temperature 21-24 C (69-75 F) night / day. Stands at the east window with additional warm white LED light for several hours. There has been no fertilization in the last couple of months.
I suspect fungus or bacteria. Perhaps recently the temperature has been slightly lower, and it did not completely dry out between waterings. Thus, the plaque on the roots is a fungus (mold?). But I don't know what to do. Should I put the roots out of bark completely and spray it with аntifungal agent? But the stem seems to be struck as well.
I suppose the yellowed leaves need to be removed anyway?
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