Fast fermentaion

[Phlyborn]

So I brewed a cream ale on Sunday 7/20. I took a refractometer reading at flame out and read 11.5 brix/ 1.046, I just took a drop and figured it would cool enough. Just to be sure I took one more reading when I was pitching the yeast and read 10.8brix/ 1.043. My question is after just two days of fermentation it appears as though it stopped and I now have a reading of 5.5 brix/ 1.008. Is that possible to be done that fast?
5 gal batch using us-05
Protein rest with 1.25lb flaked corn and 1.25lb of 2-row for 30 min.
Stepped up to 147 and added the rest of the grain 4lbs 2-row and
.650lb of caramel/ crystal 20 for 35min. And stepped again to 158 for another 30min. Boil was for 90 mins.


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[giraffe]

Ive had fermentations be solidly done in 3 days. Its possible, its a lower gravity beer, and a fermentable wort. Id give it another two days, it may drop a bit lower.

 

[sandyeggoxj]

I am assuming your fg in brix is corrected? A good healthy fermentation on a low gravity beer could be done VERY quick. How did your sample taste?

 

[Damoxemus]

Yep- I did a CDA with about 1.060 og and it was down to predicted FG of .014 in 3 days. US-05, rehydrated and properly aerated wort will do that.

 

[Phlyborn]

I didn't taste the sample. I just took enough to put on the refractometer with a dropper. It's reassuring to know it can finish that fast. There is still a lot of foam on top. I was planning on letting it sit for the rest of the week then check again and bottle if the next sample is the same. Thanks for your input, it's appreciated.


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[acidrain]

Refractometers are not accurate after fermentation. The alcohol throws them off.

 

[brouwer]

Refractometers are not accurate after fermentation. The alcohol throws them off.

That's true but you can adjust for this.


- Cheers

 

[Phlyborn]

I did use a calculated app intended for the purpose of converting brix to gravity. It's called BrixCalc, I also went to another site online and received the same adjusted readings.


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