I lost ten points after the boil. My pre-boil eff. was 74% and my brew-house was 64%? How is that possible.
And don't be afraid to explain it like you would to a 5th grader.
And don't be afraid to explain it like you would to a 5th grader.
It is pretty easy to get erroneous pre-boil SG measurements if there is any sparging or top up water involved. It is much more difficult than you think to homogenize concentrated wort and dilute wort/water. It requires very vigorous stirring. If you don't get it homogenized, it's possible to sample from either a high SG region or a low SG region. Either one of these will play havoc with the agreement between your pre-boil and post-boil efficiency calcs.
Brew on
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