General Category > All Grain Brewing
OG right after pitching yeast
LBC2:
So I'm an idiot. I guess I was so happy that I had enought volume at the end of the boil that I forgot to collect some wort for an OG reading. However, we noticed it as soon as we put the carboy in the fermentation chamber. We immediately took it out and grabbed a sample for an OG reading. I was going for 1.086, but got 1.071. We already aerated and pitched the yeast. I would estimate about 8-10 minutes passed between the pitching of the yeast and the OG reading. Is this OG reading valid, or did the yeast start going that quickly? FYI, I pitched two packs of US-05.
davidgzach:
--- Quote from: htaytobrewing on December 03, 2012, 09:00:40 am ---So I'm an idiot. I guess I was so happy that I had enought volume at the end of the boil that I forgot to collect some wort for an OG reading. However, we noticed it as soon as we put the carboy in the fermentation chamber. We immediately took it out and grabbed a sample for an OG reading. I was going for 1.086, but got 1.071. We already aerated and pitched the yeast. I would estimate about 8-10 minutes passed between the pitching of the yeast and the OG reading. Is this OG reading valid, or did the yeast start going that quickly? FYI, I pitched two packs of US-05.
--- End quote ---
1.071 is the number. Did you take the reading at the right temp?
LBC2:
--- Quote from: davidgzach on December 03, 2012, 09:02:27 am ---
--- Quote from: htaytobrewing on December 03, 2012, 09:00:40 am ---So I'm an idiot. I guess I was so happy that I had enought volume at the end of the boil that I forgot to collect some wort for an OG reading. However, we noticed it as soon as we put the carboy in the fermentation chamber. We immediately took it out and grabbed a sample for an OG reading. I was going for 1.086, but got 1.071. We already aerated and pitched the yeast. I would estimate about 8-10 minutes passed between the pitching of the yeast and the OG reading. Is this OG reading valid, or did the yeast start going that quickly? FYI, I pitched two packs of US-05.
--- End quote ---
1.071 is the number. Did you take the reading at the right temp?
--- End quote ---
Yes, we pitched at about 75F & I corrected the reading we got using Beersmith.
majorvices:
I'd recommend not pitching until the wort is below 68 for best results. Most esters and, more importantly, fusels are generated in the fist two days of fermentation. Starting the fermentation off cool will lower the fusel and ester production. I pitch WLP001/1056/WS05 around 64.
tschmidlin:
If it was a partial boil and you added water to it after the fact, then it's possible that you didn't mix it well enough and 1.071 is not the right number. If it was a full wort boil then yeah, 1.071 is the number.
And I agree with what major said re: pitching temp.
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