This path kept the old site’s most useful troubleshooting voice. The body is new. A second historic address, , 301s here.
How long should my beer ferment?
Until the specific gravity is stable across readings taken days apart. Time on a calendar is relative to temperature, yeast health and the amount of sugar you gave the yeast. A warm ferment can finish earlier and taste worse. A cool ferment can take longer and taste cleaner. The hydrometer is the instrument. The tin’s “seven days” line is a guess for a room the manufacturer cannot see.
Take a sample in a sanitised jar. Record the number. Wait two or three days. If the number has not moved, and it is in a plausible finishing range for the recipe, you may package. If it is still falling, wait.
How do I know fermentation has started?
You may see an airlock bubble, foam, or a yeast cake forming. You may also have a leaky lid that never bubbles while the beer ferments anyway. A gravity drop from the original reading is the proof. Do not panic-pitch a second yeast satchel on day one because the airlock was rude.
What temperature should I use?
Use the range printed by the yeast laboratory. Many ale strains are intended for a stable band around the mid-to-high teens Celsius. Lager strains want it colder. A laundry in an Australian January is a different climate from a southern brick garage in July. Move the fermenter, use a water bath, or use a fridge with a controller. Do not “speed it up” by parking the bucket in the sun.
Should I add extra sugar for more alcohol?
Not as a quality habit. Simple sugars ferment dry and can thin a beer or add cidery notes. If you want a stronger beer, design a higher original gravity with malt extract or mash, and pitch enough yeast. Strength is also more standard drinks; the NHMRC 2020 guidelines still apply.
My beer is cloudy. Is it ruined?
No. Young beer is often cloudy. Chill haze, yeast in suspension and wheat or oat proteins all cloud a glass. Time and cold help. Finings are optional and style-dependent. Cloud is not the same as infection. Infection usually comes with an unexpected acidity, a pellicle you did not inoculate, or an aroma that does not belong.
It smells like butter or cooked corn.
Some of those notes can be fermentation intermediates that time and a clean, completed ferment reduce. Some are signs of stressed yeast or a bacterial problem. Do not diagnose from a single adjective on the internet. Give a finished, packaged beer time in the cool, then compare. If it is sharply sour and you did not brew a sour, do not drink a lot of it while you “wait and see.”
The airlock sucked back.
A temperature drop can pull liquid back into the beer. Use a clean airlock fill, keep the fermenter out of weather swings, and do not leave a wet airlock as your only seal on a vessel that will be moved. A little suck-back is common. A filthy airlock is a sanitation problem.
Can I bottle if I am in a hurry?
You can, and you can create gushers or bottle bombs. Priming sugar plus an unfinished primary ferment is too much carbon dioxide for a glass bottle. Patience is a safety rule, not a vibe.
When gravity is stable, bulk prime so each bottle gets the same addition.
What yeast should I use?
A strain that matches the style and that you can hold in range. Dry yeast is convenient if you rehydrate as directed. Liquid yeast needs fresher handling. The yeast essay is the longer answer.
Is this legal?
Fermenting beer at home for personal use on household equipment does not require an excise manufacturer licence. Distilling the beer does. See legal and the ATO.
Better-beer habits, without a ranking
Clean, then sanitise. Use malt as the main fermentable. Hold temperature. Measure gravity. Package with a known priming charge. Condition. Those habits beat most additive packets the old catalogue stacked next to the FAQ.
If your question is really about cider, use cider and mead. If it is about a SCOBY, use kombucha. If it is about a still, stop and read the ATO.
Why does my beer taste cidery?
Often the recipe had a large simple-sugar addition, the ferment ran warm, or the beer is young. Kit instructions that dump extra dextrose into a pale ale are making a drier, thinner drink. Malt is the usual upgrade, not more table sugar. Time can soften some edges. It will not turn a sugar bomb into a malt-forward sparkling ale.
There is white stuff on the beer.
A krausen, a yeast film, or bubbles piled on the surface can be normal. Fuzzy mould that looks like bread mould is not. If you see mould, you have an oxygen and sanitation story. Do not stir it in. Decide whether to discard. This FAQ will not invent a percentage of batches that can be saved.
Can I reuse yeast?
Yes, if you know what you are doing: harvest from a clean ferment, keep it cold, and pitch soon. No, if the beer was infected or you cannot keep a jar labelled and dated. Beginners should buy fresh yeast and learn gravity first.
How much should I prime?
Use a chart for your volume and style. Bulk prime so the dose is even. See the priming guide. Do not “add a bit extra for fizz” as a personality.
Is light-struck beer infected?
No. Light-struck beer (skunky hop character from UV on hop compounds) is a glass and storage problem. Use brown bottles or keep beer in the dark. Infection is a different set of aromas.
Can I age beer a long time?
Some strong, dark beers improve with months. A hop-forward pale ale does not become more itself in a warm cupboard. Write the style down when you package so you do not treat every bottle like port.
Alcohol still counts while it ages. The NHMRC 2020 guidelines are not paused by a cellar.