So I grew my on scoby successfully from a plain, store-bought kombucha. My first batch tasted good, but no carbonation. I reused kobucha bottles that I purchased (sterilized them first). I added 1/4 cup fruit juice to a 16 oz bottle, no added sugar, 100% juice. It does not taste bad, but part of my love of kobucha is the carbonation. Any suggestions?? (also, cannot thank all that contribute to this forum -- it was super helpful!!)