Thanks for the feedback. I did not taste the wort, so I can't confirm it is sour, but i just calibrated my meter prior to use. My brix reading was at 19%, although I ended up with around 3 gallons instead of 5 (I got a new burner and didn't account for the excess evaporation!!) Another question is why does the online (brewers friend) brix to abv calculator seem whack? For example if you enter 12% brix then it says 6.4% alcohol, but then it says it would be a 1.0484 original gravity?? That doesn't make sense, because a 1.0484 would be around 5% alcohol??
Thanks!