African Violets and Gesneriads: What is this growing?, 1 by Dimmer

Dimmer wrote:
I have a Terrarium of AV leaves and they have gotten pretty big so I decided today to put in small pots but when I was taking them out I started to pull all this out of my Terrarium. I don't think its roots because it is very long and course,
I will also put this question in the Container form but I thought maybe scents I am growing AV someone might have idea, I use my regular potting soil that I do all my planting with but I have never seen any of this in my plants or in the dirt when I do transplanting
Dimmer,
The next picture will be from my Terrarium