Start with only a little candied ginger or syrup.
Turns out, just like making kombucha, making ginger kombucha is easy! Here is a printable version! The brew builds up pressure from within, which can lead to bottles bursting if they are weak.
Another option is decaf tea.
It could take two weeks depending on fermenting conditions, but shouldn't be much more.
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You can speed up the cooling process by placing the pot in a cold water bath in your sink.