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