I have a Pilea involucrata inside of a bioactive terrarium within a jar that I made. It's my first terrarium, and I started it recently. I noticed that my Pilea had started growing aerial roots a few days after I planted it. A few weeks later, I found black spots on many of its leaves and the edges of some of its leaves are blackening! Some of the black spots have white heads at the end, almost like a pimple, and those spots seem to kinda become holes in the leaf sometimes. I have one leaf in particular that has gotten a huge hole put straight through it! What could be causing this? What should I do about it?
by Minecraftitisist69