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Water kefir grains may benefit from water sources with higher mineral content. Some water sources such as well water or spring water can be naturally high in mineral content and are ideal for making kefir.

Avoid distilled water, reverse osmosis water, and water which has been filtered through an activated carbon filter (such as a Britta or Pur) often have extremely low or non-existent mineral levels.
If you use one of these types of water, and your water kefir grains seem sluggish or inactive, it may help to either use a high mineral sugar (see above) or add a mineral supplement to your water.

Structured, alkalized, or pH-adjusted water is not appropriate for culturing water kefir.

Mineral Supplements

When using a mineral supplement, it’s important to start by using just one supplement to avoid overloading the grains. Try adding one of the following supplements to your next batch of water kefir and see how your kefir and grains react.

  • ⅛ teaspoon unrefined sea salt
  • ¼ teaspoon plain baking soda
  • ½ teaspoon unsulphured blackstrap molasses

Using Tap Water

If using tap water, we do recommend filtering the water to remove as many additives, chemicals and contaminants as possible.
If filtering is not possible, aerating or boiling the water for 20 minutes may help remove at least the chlorine. This process will not remove chloramines and fluoride though, so you must use special filters to remove these. You can also let your tap water stand for 24 hours to help the chlorine to evaporate.


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