I chose to bottle mine on day 3. (Before bottling, make sure you filter your soda with a large strainer or colander.) Since I have had homemade soda bottles explode on me before, I am putting mine in the fridge right away. The original recipe called for a second fermentation in the bottles, but I'm a little paranoid about exploding glass. So, I will keep mine in the fridge for another week or so, then I will test the carbonation and go from there! If you choose to leave your bottles on the counter for another 2-3 days, please check the carbonation every 12 to 24 hours so that an accidental explosion is less likely! I would rather be cautious than sorry. :)
Enjoy your homemade, probiotic-rich sodas with family and friends. Feel good about serving a healthy soda to the people you love!