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Homebrew Troubleshooting

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Stuck Fermentation

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Possible causes include insufficient yeast, incorrect temperatures, or lack of nutrients. Solutions: Re-pitch more yeast, adjust temperature, or add nutrients.

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Infection or Contamination

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Causes are usually improper sanitation or wild yeast. Solutions: Improve sanitation practices, use proper sterilization techniques, and ensure airtight seals.

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Off-flavors or Aromas

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Could be due to chlorinated water, poor yeast health, or fermentation temperature issues. Solution: Use filtered water, healthy yeast, control fermentation temperature.

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Cloudy Beer

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Possible causes: Proteins, yeast in suspension, or starches. Solutions: Use finings, cold crash beer, ensure complete fermentation.

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Low Alcohol Content

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Could result from a low original gravity, incomplete fermentation, or measurement error. Solutions: Review recipe, ensure complete fermentation, recalibrate hydrometer.

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High Alcohol Content

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Causes may include higher than expected original gravity or a more complete fermentation. Solutions: Adjust recipe, check fermentation process, and dilute if needed.

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Excessive Foam During Fermentation

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Could be caused by high fermentation temperature, over-pitching yeast, or excessive proteins. Solutions: Control fermentation temperature, pitch yeast correctly, and address wort composition.

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Sediment at the Bottom of Bottles

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Often due to yeast or hop debris. Solutions: Allow longer settling, use fining agents, or filter the beer before bottling.

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Sour or Acidic Taste

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Can be caused by bacterial infection, high acid malt, or poor water profile. Solutions: Improve sanitation, adjust malt bill, balance water pH.

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Unintended Vinegar Flavor

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Acetic acid production from bacterial contamination. Solutions: Sanitize all equipment, seal fermentor properly, and avoid oxygen exposure post-fermentation.

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Diminished Hop Aroma

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Caused by hop degradation, wrong hop schedule, or poor storage. Solutions: Use fresh hops, optimize hop schedule, store beer correctly.

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Unexpectedly Bitter Beer

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May be due to over hopping, extended boil times or water profile issues. Solutions: Adjust hopping rates, monitor boil time, and check water chemistry.

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Beer is Too Sweet

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Possible from unfermented sugars, low attenuation yeast, or incorrect mash temperatures. Solutions: Ensure yeast health, use a higher attenuating yeast strain or adjust mash temperatures.

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Lack of Head Retention

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Could be caused by oils or fats in the brewing process, improper glassware, or lack of proteins. Solutions: Avoid any ingredients with oils, clean glasses properly, and adjust malt bill for more proteins.

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Flat Beer

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Result of low carbonation due to insufficient priming sugar, yeast health, or leaky bottles. Solutions: Measure priming sugar accurately, ensure yeast vitality, and check seals on bottles.

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Beer Color is Too Dark

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This can occur bFrom caramelization during the boil, using too much dark malt, or oxidation. Solutions: Avoid prolonged boils, adjust malt bill, and prevent oxidation.

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Beer Color is Too Light

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Possible due to insufficient amounts of the proper malts or incorrect malt types. Solutions: Adjust the malt bill to include specialty grains, or review malt extract quality.

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Phenolic Off-flavors (Medicinal, Smoky, Spicy)

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Caused by chlorine in water, wild yeast contamination or high fermentation temperatures. Solutions: Use filtered/dechlorinated water, improve sanitation, and control fermentation temps.

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Diacetyl (Butter-like Flavor)

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May be due to yeast stress or insufficient conditioning. Solutions: Ensure a healthy yeast pitch, allow more time for conditioning, and perform a diacetyl rest.

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Overcarbonation in Bottles

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Typically caused by bottling before fermentation is complete, excess priming sugar, or infection. Solutions: Ensure fermentation completion, correctly calculate priming sugar, address sanitation.

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