If you used the Kefir culture packages, save ½ cup from each batch to inoculate the next quart of coconut water. It will culture faster each time. Many times it will only take a day to culture. You can do this up to 20 times on each package or until it stops culturing. Mine can go up to 20 or 30 times. If you use ½ cup of kefir whey, you will start over each time with your kefir whey in new coconut juice.