Are you overflowing in scoby, you have a few options. First, you can use your extra scoby to brew. Leaving a few scoby in your brew vessel is okay and will help it brew. Do not leave more than 3-4 scoby in your brew vessel, if you do you will end up with mostly scoby and little kombucha. Secondly, Scoby is edible and there are many ways you can utilize them. From scoby fruit rolls to dog treats. If you simply do not want or need the extra scoby you can throw them out or use them for compost. Scoby are biodegradable and will break down quickly.