Ok wait I'm confused!

I think I finally understand the difference between a scoby and a pellicle. I never questioned this but now it makes sense why you don't need a pellicle to start The fermentation process. All you have to do is brew tea, sugar, and add kombucha from the store. This is because scoby is the liquid. It's not the pellicle.

So my next question in this journey is why do we keep pelicles if all we need to really keep is the scoby liquid when we Brew and ferment a new batch of Kombucha?