The Quick-Answer Kombucha FAQ

Taste it. Getting less sweet and more tart over the days = fermenting, full stop. Surface film, edge bubbles and a faint vinegar aroma are supporting evidence. A new SCOBY is a nice bonus, not a requirement — cool rooms often grow thin ones or none. What to expect during F1 →

Mold is fuzzy, dry-looking, surface-only, in bread-mold colors, often concentric circles. Wet, glossy white specks appearing around day 2–4 are a new SCOBY forming — the single most common false alarm in home brewing. The full mold guide →

Toss everything — liquid and pellicle, no salvage — sanitize your equipment, and restart with fresh culture and two full cups of strong starter tea. It's disappointing, not dangerous: treat it like moldy bread. Prevention checklist →

All completely normal. Sink, float, hover — none of it predicts anything. And healthy SCOBYs routinely look like something from a monster movie. SCOBY care →

Healthy yeast — the organisms that ferment your tea and carbonate your bottles. Strain them out at serving time if you like; never try to purge them from the brew. More →

Typically 7–14 days at average room temperature (around 70°F) — faster in warm homes, slower in cool ones. Start tasting at day 5. It's done when it tastes done to you. Doneness guide →

In order of likelihood: not enough time at room temperature, caps not truly airtight, bottles not pressure-rated, fruit chunked instead of pureed, yeast left settled at bottling. The flat-kombucha checklist →

Vigorous yeast + sugary flavoring + warm room = geyser potential. Chill fully before opening, open over the sink, shorten F2 next round. Taming the fizz →

Almost always a bottle that was never built for pressure. Buy genuinely pressure-rated bottles, seal them properly, and explosion risk drops to nearly nil. Bottles & caps guide →

No — burping vents your fizz and tells you little (room-temperature opens always exaggerate carbonation). Exception: long, deliberately dry ferments — burp those every 2–3 days. The burping question →

Not at all. Cold slows the culture without killing it — pull the bottles back to room temperature and let them keep fermenting until fizzy. F2 timing →

Brief contact with clean stainless steel — spoons, strainers, funnels — is fine; plenty of brewers (Ange included) have used metal spoons forever with zero drama. The thing to avoid is fermenting in reactive metal containers. If you're superstitious about it, wood and plastic work too. The materials video →

As a starter-tea substitute, yes. Here's the nuance: kombucha is a specific type of vinegar culture — and distilled white or apple cider vinegar carries a different vinegar culture, with a different pH and different flavors, that can throw yours out of balance. In Ange's side-by-side tests (and conversations with hundreds of homebrewers), other vinegars mean a higher risk of overly acidic, astringent, imbalanced brews. Strong kombucha starter tea does the job better. The full story, and how to recover →

Never. Cold sends the culture dormant, weakening its defenses. Room-temperature SCOBY hotel instead. Build one in 5 minutes →

Absolutely — park your pellicles in a hotel and walk away for months. Restarting takes one strong batch. Taking a break → · Restarting →

Green tea (and any true tea): yes. Honey: not in standard kombucha — it belongs to jun, a related but distinct ferment with its own culture. Sugar 101 → · Brewing jun →

Fermentation always produces trace alcohol — home brews typically hover around half a percent, a bit more with long, sugary ferments. Not a party in a bottle, but not absolute zero either; worth knowing if you avoid alcohol completely. The alcohol video →

Start small — a few ounces a day — and let your body vote. It's a live, acidic ferment, not a miracle tonic, and more isn't better. Health questions belong with your doctor, not a website.

Refrigerated, sealed kombucha keeps for months — it just gets gradually more tart and less fizzy. Aged kombucha is actually a delicacy if you like sour-beer vibes. Dry-aged kombucha →

It's fresher, cheaper (pennies vs. $5 a bottle), fully customizable, and unfiltered-alive in a way shelf products can't be. Also more fun. Ange's honest comparison: Real talk on store-bought →