You will need:
- 1l coconut water
- Sugar to add if less than 5 g/ 100ml of carbohydrate
- Water Kefir Grains.
Add kefir grains to the coconut water, either in the vessel it came in or a plastic bottle or large glass bottle or jar with clingfilm over the top, and ferment on the work top for about 24 hours. After this time, taste and if required level of fizziness and sweetness have been reached see DAY 2 above…. ( basically strain, bottle and refrigerate).
Which Coconut Water?
Any brand will do, though fresh rather than uht is usually recommended, there’s no reason that it wouldn’t work. Don’t worry if it has added sugar as this is all energy for your kefir water microbes. Some brands (eg Vita) contain 5% sugar which is perfect. Innocent contains 3.4% sugar so is a little low – you will need to add about 15 grams extra sugar to a litre of this. Morrison’s own brand comes in a clear plastic bottle so you can see what’s going on and has added sugar.