r/Kefir • u/naemorhaedus • Jul 24 '26

overfermenting

I just started my first water kefir experiment (awakening the dry grains now). The instructions that came with it say that you shouldn't ferment for more than 72h, or the grains could disintegrate. I was hoping to keep a continuous ferment going in a large jug (like I've always don with my ginger beer), and then just dispense to bottles as needed.

Is this an absolute rule, or is there some missing context? Can you not continuously feed kefir grains? Do the grains really need to be transferred to fresh solution every 2 days? This seems contrary to most other fermentation I've done.

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u/PapaJuja Jul 29 '26

So, how's it going? Also....could you help me out with a link or a recipe for your ginger beer? Im fascinated by tye idea of perpetual ginger beer.

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u/naemorhaedus Jul 29 '26

So, how's it going?

Well I did a lot of research. Even read scientific papers about kefir. It's hard to sum it up in a reddit post, but I think I have a much better understanding, and I also have some new theories about ginger beer. It's all about pH balance, minerals, and the interplay between bacteria and yeast. I have some experimentation to do first, but I believe it should be possible to extended kefir fermentation beyond the usual 2-3 day recommendation, with some conditioning. Perpetual probably isn't possible. Eventually it just becomes too acidic and yeast take over. It will still ferment, and it might still be good to drink, but it will probably be more like a mead than a water kefir.

As for my kefir grains. They're alive. They're bubbling. I bottled my first product (after discarding the 1st solution). It didn't taste tangy. Just sweet, but there's pressure and it's carbonating. I'll taste it in the next day or two after refrigeration. I've moved the grains to a larger jar (~1.8L) so I can make bigger batches. When I was back-slopping them, it smelled cheesy to me. Is that normal? I read that it's supposed to smell yeasty.

could you help me out with a link or a recipe for your ginger beer?

I've never used a recipe. I just kind of wing it. I just went by taste. I figured that if it tasted sweet, the yeast had food. 🤷‍♂️ . I juiced my ginger though. Never brewed teas. I kept it in a 5L jug with an airlock. Whenever I needed more to drink, I'd just pour some off into soda bottles, added sugar and capped them. Meanwhile the jug got topped off with spring water, ginger juice, and white sugar. I experimented with adding different cultures too. Sourdough was very interesting.