You've provided an original refractometer reading of 15.9 Brix, final refractometer of "1.027", and final hydrometer of 1.025.
My understanding is that you used US-05 yeast. Unless your recipe was extremely wonky, typically this yeast attenuates to a percentage in the mid-80s, with an average of about 83%.
Assuming your original Brix of 15.9 Brix is accurate, which equates to 1.065 OG, you should end up with FG of approximately 1.011 on a hydrometer, or a final Brix reading of about 7.0, to equate to the 1.011, based on the following calculator:
http://seanterrill.com/2012/01/06/refractometer-calculator/
Your reading of 1.025 is nowhere near 1.011. Could be a recipe problem. However I think it's an error of how the readings are taken, and here's why.
I keep putting the "1.027" in quotation marks because a refractometer does not measure in specific gravity units, and ESPECIALLY should not be reported as such when alcohol is present. If you are still using the SG scale on your refractometer, please don't. Take all refractometer measurements in Brix.
Based on the "1.027", my GUESS is that your actual final Brix reading would be about 6.4. This would equate to a final gravity of 1.009. If I am correct, THAT would be pretty close to the expected FG of 1.011 from US-05. (You did use US-05, did you not?) See this:
Finally, I think your hydrometer might be broken. Under normal circumstances, a hydrometer should always be more accurate than a refractometer. However, there's just no way I can see that the FG can be 1.025, given your refractometer readings of 15.9 Brix and "1.027", and assuming your recipe and brewing technique aren't crap.
So, this is the long and complicated answer for why I said "your readings cannot possibly all be correct". It's just not possible.
My understanding is that you used US-05 yeast. Unless your recipe was extremely wonky, typically this yeast attenuates to a percentage in the mid-80s, with an average of about 83%.
Assuming your original Brix of 15.9 Brix is accurate, which equates to 1.065 OG, you should end up with FG of approximately 1.011 on a hydrometer, or a final Brix reading of about 7.0, to equate to the 1.011, based on the following calculator:
http://seanterrill.com/2012/01/06/refractometer-calculator/
Your reading of 1.025 is nowhere near 1.011. Could be a recipe problem. However I think it's an error of how the readings are taken, and here's why.
I keep putting the "1.027" in quotation marks because a refractometer does not measure in specific gravity units, and ESPECIALLY should not be reported as such when alcohol is present. If you are still using the SG scale on your refractometer, please don't. Take all refractometer measurements in Brix.
Based on the "1.027", my GUESS is that your actual final Brix reading would be about 6.4. This would equate to a final gravity of 1.009. If I am correct, THAT would be pretty close to the expected FG of 1.011 from US-05. (You did use US-05, did you not?) See this:
Finally, I think your hydrometer might be broken. Under normal circumstances, a hydrometer should always be more accurate than a refractometer. However, there's just no way I can see that the FG can be 1.025, given your refractometer readings of 15.9 Brix and "1.027", and assuming your recipe and brewing technique aren't crap.
So, this is the long and complicated answer for why I said "your readings cannot possibly all be correct". It's just not possible.
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