BlindFaith
Well-Known Member
I posted this issue on the beginner's forum as well, but I thought I could get a more knowledgeable response here. Ok, I brewed a Founder's BS Clone with no real issues as my pre-boil gravity came out at 65 points. My OG, at about 85 F, reads 73 points. I have been using the formula of V1*C1 = V2*C2 to calculate my OG based on my volumes (V1 and V2) and pre-boil gravity (C1). This time my OG should have been 83 points, according to the formula (which has never been wrong before), but it is 10 points low. What gives? There is no top off, so it isn't an aeration problem. I aerated and checked again anyway, same thing. I just calibrated my hydrometer, but I also have a refractometer and it shows the same. I took a hydrometer and refractometer pre-boil sample just to be safe and they both read very close at around 65 points. I am confused.....
6.3 gallons pre-boil
Just under 5 post
6.3 gallons pre-boil
Just under 5 post