Weiß jemand, was das schwarze Zeug auf meinem Mondtal ist? Außerdem werden die Blätter etwas trocken und knusprig. Gibt es irgendwelche Tipps? Danke

Do you mean the darker areas on all the leaves in the folds? If so, afaik they naturally do that as they mature, mine has the same coloration. If you mean the dry area that’s just it crispifying. I had an issue with a lot of the leaves on mine doing the same thing and going crispy, so I dialed back watering a little bit and it seems to be happier and all the newer leaves look healthy. It could be over watering (but also under watering, of course). I usually test with my pinkie and push it down about an inch and if the soil is dry I’ll water it, otherwise I hold off. It usually takes about a week or mine to dry out.