New answers tagged original-gravity
I doubt a weak boil would alter your OG post-topoff. Do you know what the OG was supposed to be? 1.037 is on the lower end for a recipe, but not that uncommon.
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.
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