Second fermentation guide
Get carbonation without chaos
Use the calculator to set fermentables and timing, then follow this process framework so carbonation stays intentional, controlled, and repeatable across batches.
Varies with sugar load, yeast activity, and room temperature.
More fermentables can mean faster pressure gain.
Release pressure and refrigerate once target fizz is reached.
Carbonation risk rises when all three increase together. Adjust one dial at a time so you can trace outcomes and keep control.
Choose your fermentable source
Use juice mode when flavor integration is the priority and sugar mode when pressure control is the priority.
Both approaches work, but consistency is better when you keep one baseline method.
Set a realistic sugar load for your bottles
Higher fermentable loads can carbonate faster than expected, especially in warm rooms.
Start conservative when changing bottle type, fruit mix, or ambient temperature.
Balance timing and pressure
Short windows produce lighter carbonation while longer warm windows can build pressure quickly.
Always match timing with bottle strength and burping frequency.
Burping schedule is process control
Use earlier and more frequent checks when sugar is high or room temperature is warm.
Refrigerate as soon as carbonation target is reached to slow further pressure rise.
Use bottles rated for pressure
Swing-top or pressure-rated bottles reduce risk compared with decorative or thin glass containers.
Uniform bottle type improves consistency across a batch.
Safety and repeatability
Do not leave highly active bottles unattended in hot spaces for extended periods.
Use logs, staged checks, and refrigeration to control carbonation safely and repeatably.
Free download
Download the free Kombucha Brewing Schedule
Use the printable 2F checklist for sugar inputs, burping timing, and bottle safety tracking.