When can you start sharing the Scoby? March 17, 2021 15:02 Updated You can cut the scoby when it is about a finger thick. Make sure that it is no longer translucent. Related articles What ingredients are used for the kombucha bottles? Which cultures are contained in Kombucha? Do you send your Kombucha tea mushroom with the liquid? What else can you do with the Scoby? I have no possibility to filter water. Is tap water still okay for kombucha?