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Huge jump in gravity

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h22lude

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I went over my friends house on Tuesday. He got a True Brew kit for Xmas with a True Brew Ocktoberfest ingredient kit. Right off the bat I didn't like it. The instructions were terrible and I didn't like the yeast. It didn't have any markings on it saying what type it was (it was dry yeast). But since I have brewed a few batches and doing a ton of research on here, I tweaked the recipe to be what you would typically think of for extract brewing. Steeping special grains at 155 to 160 for 20 minutes or so. Boiling the water, adding the malt and hops and letting it boil for 60 minutes.

He had a 20 qt pot to use on his gas stove. I thought it would be a perfect size. The pot fit nice on the burner and the flame came out just to the edge of the pot but it wasn't a huge rolling boil. I would say it was just a small rolling boil.

Everything seem to go ok. OG was 1.042 with about 4.75 gallons. He bought distilled water which I think is fine for an extract. The temp has been 68.

He took a gravity reading today and he said it was 1.020. Going from 1.042 to 1.020 in 48 hours just seems like a big jump to me. I told him it is probably nothing to be worried about and just keep taking the readings each day until he sees the gravity flattening out for a few days in a row. The instructions say fermenting should be done by 72 hours.

It just seems very quick to me. I told him we should keep it in there for at least a week if not 2 just to let it finish and everything settle to the bottom before racking to the bottling bucket. What do you guys think?
 
Not a huge jump if he's got a good active fermentation. It's not unheard of for fermentation to complete in 48-72 hours. The reason most of us don't follow the destructions and let the beer stay in primary is to make sure fermentation is complete and allow the yeasties to do their job and clean up after themselves. Longer primary leads to clearer, cleaner tasting beers in my experience.
 
Sounds just about right to me. Sit on it for a month if you can, but your time frame will also work.
 
I'm with eubrew. The kits often have sloppy instructions that advise fermentation will complete in a short amount of time - I guess its so their customers aren't put off by the time that should be spent to brew beer. 10 days is my minimum for a simple, low IBU, low grav beer. Longer if the grav readings suggest it.
 
I had a beer that went from 1.055 to 1.010 is 28 hours. Active fermentation was going after 3 hours.

The quickest I have ever seen.

You are OK.

Per other's advice. Leave it alone for 2 to 3 weeks.
 

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