Does anyone have any Kombucha recipes?

I just got a kambucha and I love it. Much lower carbs than soft drinks. The bottle I am looking at is 12g for a bottle. Since I have been diagnosed I have kind of lost my taste for heavy sugar and bread, so I'm hoping to find a kombucha recipe so I can make my own that would result in about 6g of carbs per 12 ounce servings. Lots of sites on the interwebs talk about recipes but I'd like to see if anyone living the low carb/sugar lifestyle has a proven recipe that they love. Thanks!