I came up with this recipe out of necessity. With an overabundance of fruit trees in my new backyard, I had to think of ways to use them. The presence of white grape juice in this recipe provides the sugar content needed for the cultures to consume and make probiotics! It doesn't hinder the citrus flavor and helps provide the fizz!
Fill the rest of the bottle with water leaving an inch of room at the top.
Allow it to ferment for 2-5 days or until bubbly and fizzy. If your home is 75°F or warmer it will usually take 3-4 days. Colder homes can take a week or longer but you'll need to check it by popping the top to see if it's getting fizzy. It will start to bubble out the top if it does.
When it's done, place it in the fridge right away. You can enjoy right away, but keep it stored in the fridge or it will explode. Consume within 1-2 weeks for the best flavor and most benefit.
You can use ⅓ cup of this finished kefir soda as a starter to make a new bottle. Add the other ingredients and ferment again. It should only take a half to a full day to ferment. It ferments faster and you can make many bottles over and over again!