Is there something wrong if my scoby sinks? No, it is completely normal for your scoby to sink, it will still work! Related articles My kombucha tastes vinegary, what have I done wrong? How do I store the scoby's when not in use? How do I know my kombucha is fermenting properly? What if my scoby grows mould on the top of it? Is my kombucha culture reusable?