Water kefir grains often float in the liquid they are fermenting, which is completely normal and expected. This floating behavior is due to the presence of gas bubbles that are produced during the fermentation process.
Water kefir grains are a combination of bacteria and yeast, and they feed on sugar to produce lactic acid, carbon dioxide, and alcohol. The carbon dioxide gas produced during fermentation gets trapped in the grains and the liquid, causing them to rise and float.
If your water kefir grains are floating, it indicates that they are actively fermenting and producing healthy probiotics. However, if your grains sink to the bottom and don’t float at all, it could be a sign that they are weak or inactive and need to be revitalized with a sugar solution.
In summary, seeing water kefir grains floating is a good sign that the fermentation process is working correctly and that your grains are healthy.