Sometimes unexpected stuff can happen to your ecosystem or terrarium. but don't worry, its usually easy to fix.
We are dealing with living plants and organisms, and as you know, sometimes nature just goes its own way. Even if we seal it up in a container.
It can be anything from where it's placed, to the temperature in the room. So let see, maybe you can find the answer below.
If not, send us an email and dont forget to add a couple of pictures.