What happened to all my beer?

I'm a new homebrewer and I just finished racking my second batch of beer, a one-gallon Irish stout from extract.

My first batch came out great, and made six delicious bottles. But, when I took the carboy out to rack the beer this time, about half of the original volume seemed to be missing - only enough for three bottles. There was also an unusually large amount of trub on the bottom, way more than I had in my first batch.

Both batches were the same kind of beer, from the same supplier, and I tried to follow the exact same steps.

What could cause this discrepancy?

Topic trub racking homebrew

Category Mac

1
answered at

Gratz on your second brew!

This is just speculation from the limited info. Detailed steps and ingredients will help in the future.

If there is actual liquid volume missing from the fermentor, then it left in the form of foam out the airlock or someone drank it. If there's no mess, then the later

Here are some common causes of large beer stealing trub beds. Trub takes up space and reduces your final yield, but doesn't reduce total volume in fermentor.

  • large cell count from high gravity beers
  • high floculant yeast
  • misuse of whirlfloc or Irish moss. This should be left behind in the whirlpool. Often overdosed.
  • fruit additions adding plant material
  • dry hopping or transfering boil hop additions material to fermentor. Can be limited by proper use of hop bags and boil finnings.

I'm sure there are many more, this is just what comes to mind.

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