There are two things that determine how bubbly and how fast your kombucha will be done. Temperature in your home will determine how fast your kombucha ferments. 75 80 degrees will ferment much faster - it can be done in just a few days, while temperatures in the 60's can take several weeks. You'll need to check the bottles often to make sure they don't explode.
To make sure your kombucha is bubbly, you’ll need to make sure your kombucha is not too sour or overly vinegary tasting. It needs to eat the sugars to make the carbonation - if all the sugar is gone, it will have nothing to eat to make the natural carbonation. It is best to make your batch when your kombucha is just a tiny bit sweet and not overly sour. To see more info, refer to this blog. My Kombucha is Not Bubbly
Always use good bottles made for brewing.
*Always use bottles that are made for brewing!
*Cooler houses will ferment at a slower pace and warmer houses will ferment faster :)
*If using fresh raw juice (vs bottled) the fermentation time will be cut in half.