How to Make Water Kefir More Fizzy

by Nathan Pujol May 18, 2018 7 Comments

Fizzy water kefir

When it comes to water kefir or ginger beer, most people prefer it fizzy. It adds dimension, taste and fun to a healthy beverage. For those who just have to have that fizz, here’s our guide to getting the most fizz out of your fermented beverage:

    1. Strong first ferment

      Everyone talks about 2nd ferments when it comes to carbonation, but the real key to getting good carbonation is a strong first ferment. If your first ferment is weak, you will likely have trouble getting significant fizz no matter what you do during the 2nd ferment. If its still really sweet after 48 hours, you will have a hard time getting that delicious multidimensional flavor or much carbonation during the 2nd ferment or storage. Carbonation tends to kick into gear only when the yeast is strong and the sugar content is low.

      • Minerals in the sugar, Minerals in the water.

      Yeast is what creates the carbonation. The stronger the yeast, the stronger the fizz. Yeast loves minerals, so make sure to do a mineral rich ferment with at-least 50% of a dark mineral sugar. Try a spoonful of molasses to really get that yeast happy. Also, minerals in the water is just as important. Mineral or well water is best. If you have to use filtered water or your water is really soft, then add some trace mineral drops or calcium supplements. Boiled egg shells, baking soda, dolomite are good choices.

      • Heat
      Kefir jar thermometer

        Yeast loves the heat and helps create stronger yeast. Try for the low to mid 70’s for a strong balanced ferment. If its below 70, it can still ferment fine, but it tends to be bacteria rich and sour instead of tangy and fizzy.

        1. 2nd Ferment

        Now that you have a strong first ferment that’s not very sweet anymore and somewhat tangy, its ready for a 2nd ferment. It may be already slightly fizzy or have very little fizz, either way is okay.

        Here are some things you can add during the 2nd ferment (when the grains are out) to really get that carbonation going during:

        • Fruit Juice: Fruit juices are probably the easiest way to get carbonation. Be aware that fruit juices can also create higher levels of alcohol. I recommend grape juice, its delicious and can create a bombs worth amount of carbonation. Apple, pomegranate, cherry, prune juice are also good options. Add a couple ounces and let sit for 1-2 days at room temperature with a lid on. Keep an eye on it though as the carbonation does have the potential to break the jar. Burp the jar or bottle if need be. Chill in the fridge before drinking.
        • Fresh ginger: The yeast will thank you. You can use the juice but blending the ginger with some water and then strain the juice from all the fiber. Another option is to peel the ginger and cut up discs of ginger which you can easily remove before consuming.
        • Organic Lemon, lime or orange peel: Citrus peels can make it fizzy and delicious. Be sure to take them out after a few hours so it doesn’t become bitter though.
            • Add a teaspoon or so of fresh sugar: Any sugar can work, but darker sugars tend to work a little better.

            3. Swing top bottles

            Swing top bottle

            Swing top bottles are a must for those serious about bottling and carbonation. It’s ideal for building carbonation and durable enough to withstand extreme carbonation (although be aware that they can still break). I recommend leaving about a 2 inch head space when bottling the kefir.

            5. Airlock or closed lid first ferment

            Air lock system for fermentations

            Water kefir can ferment anaerobic (without oxygen) if desired. Traditionally, water kefir was fermented with an open lid, but they can do just as well with a closed lid or airlock system. If you want carbonation / fizz and want to drink it fresh without a 2nd ferment, then this is the best option.  If you plan to do a 2nd ferment or a few days of storage in the fridge, then it doesn't really matter that much if you use a open or closed lid.

            4. Ginger beer plant

            ginger beer plant

            Try the ginger beer plant instead of water kefir grains. Ginger beer tends to be naturally fizzier than water kefir due to the yeast composition, higher mineral needs and longer ferments.

             5. Fridge storage

            Skip the 2nd ferment and simply store in the fridge. Some of my strongest fizzy ferments are ferments that are simply stored in a closed lid in the fridge for a few days without a 2nd ferment. If you had a strong ferment with plenty of yeast activity, a few days in the fridge will build a significant amount of carbonation without the need to add anything else.

            Note: You can combine 2nd ferments and a long fridge storage for even more carbonation.

            6. Water Kefir Recipes

            Search our favorite water kefir recipes that are balanced for flavor as well as fizz. Most will create an abundant amount of carbonation to satisfy your all fizzy needs.

            Summary: Start with a strong first ferment which includes a mineral / nutrient rich recipe as well as mineral rich water. Ferment for 48 hours in the 70-75 degree range. Do a 2nd ferment with a bit of fruit juice or ginger or critic peels or fresh sugar (or a combination). Let sit for 1-2 days. Chill in the fridge and enjoy.

            Nathan Pujol
            Nathan Pujol


            Co-founder and author of Graduate degree in clinical psychology. Researcher with emphasis on the gut microbiome, fermentations and their connection to mental and physical well-being. He has 15 years of experience with making, sharing and teaching about traditional ferments.

            7 Responses

            Yemoos Nourishing Cultures
            Yemoos Nourishing Cultures

            April 30, 2019

            Hi Alexe – Thick syrupy water kefir is not too common, but it tends to happen under two circumstances, when there’s too many minerals and/or its too cold. Try using less mineral rich sugars and more lighter / white sugars. Also try to find a warmer spot if possible.

            Alixe Tayler
            Alixe Tayler

            April 30, 2019

            Hi, I was wondering if you have any advice on syrupy water kefir. I seem to have a problem with every batch I make. Out of 5 bottles at least 1 to 2 bottles are syrupy….this is on the first fermentation. I’ve tried using less sugar and more scobys but nothing seems to work. Any help would greatly be appreciated!

            Yemoos Nourishing Cultures
            Yemoos Nourishing Cultures

            March 17, 2019

            Katie – Nothing bad will happen if you do a 2nd ferment with an open lid. You just won’t get as much carbonation as some of it will escape. But you can also just use a closed jar (not the swing top bottles). Those jars are not as strong as the flip top / swing top bottles so you run a greater risk of them breaking, especially if you are doing a room temperature 2nd ferment. If concerned, just pop the lid once in a while and it should be fine.


            March 17, 2019

            If I do a second ferment, is it absolutely necessary to use a closed bottle? I know it won’t be fizzy if I use an open container for the second ferment, I’m just wondering if anything bad would happen. The swing top bottles are annoying to clean and I’d rather just use a jar for both ferments, unless I’m setting myself up to get sick or something…

            Alex Parker
            Alex Parker

            December 18, 2018

            Odette, you can have grains that produce decent kefir, but not multiple. At some point if they don’t grow, you will likely need to replace them. Sometimes a good rinse or rest in the fridge can help kick start them into growth again.


            December 16, 2018

            I bought kefir grains from Amazon but they remain very small,like wet sugar and they do not multiply.I use dark sugar and molasses and it still does not work.I’m on my 5th badch.Does that mean my grains are no good


            October 12, 2018

            Thanks for the information. I tried some grape juice and boy did I get plenty of carbonation and fizz. It was slightly more alcohol then I wanted, but I think it was because I left it long. Still delicious though.

            Leave a comment

            Comments will be approved before showing up.

            Yemoos Nourishing Cultures Newsletter

            Sign up for fermenting tips, the latest research, recipes, exclusive discounts and offers!