Thanks in advance for putting up with yet another newb question.
I brewed a Belgian Dark Strong about two weeks ago. Here's the recipe:
I used two vials of WLP570 in a 1.5L starter. I've never had problems with efficiency with my AG setup. I forgot to take a gravity reading on the brew day, so I used my refractometer, my hydrometer, and Beersmith's 'Refractometer tool' to see how my fermentation was doing. Here's what my readings were:
Refractometer: 10.5 Brix
Beersmith's calculated OG: 1.064
The recipe's expected OG: 1.103
Calculated attenuation: 55%
Expected attenuation based on yeast/recipe: 70-80%
Either A: I completely messed something up or B: my refractometer is wrong. Both my hydrometer and refractometer show 1.000 or 0 when used with plan water, and are roughly in agreement when a sucrose solution is used. Do I just assume that my refractometer is the problem, and keep going, do I try a different refractometer, or do I forget the Beersmith calculations and assume I'm OK? (1.028 wouldn't be too far off of an expected FG for this beer).