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If you have some dry malt extract (or liquid), you can get the gravity to where you want it now. It's not too late to add the DME, even though it's already in the fermenter. About 1 pound of DME should get you up to about 1.045, which should give you a roughly 5% abv beer.


To fix the low gravity I followed Jeff's suggestion and added dry Dextrose/Malt mix. Here's the details in case someone else wants to try this procedure for the first time. I did some calculations in BeerSmith and added 1kg of Dextrose/Malt mix into 1.5L of wort from the fermenter + 1.5L of boiled water. Boiled this then cooled to fermenter temp (24C). This ...


You say your boil was weak, and you didn't stir much. Extracts are hard to dissolve properly. Even vigorous boil without stirring may fail to do it. And 10-20 minutes of vigorous stir before wort boils may be barely enough. And it gets worse the less water you have in boil, so partial boil brews are most exposed to this risk. Sugars are heavier than water, ...

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