Made my second all grain beer today, and have a few questions.
I used a corona mill to crush my grain, however I conditioned the malt first.
I'm BIAB'ing, and my first batch tasted great when I racked to secondary, but it's OG was low as well.
My efficiency into boiler was 88%, which I am relatively happy with, however, beersmith says my brewhouse efficiency was only 60%, based off the estimated OG of 1.065, and actual OG of 1.052.
I used 2.5 quarts of water to mash (1.76 lbs of grain), and another 3 quarts to sparge. I also added PH 5.2 stabilizer to my mash water to insure proper PH. However, I did not check it
Mash temp was 158 initially, fell to about 151. Sparge temp was 170. I mashed for an hour, then moved the grain bag to the sparge water (170 after addition of grain), where I sparged for 15 minutes. Then, I combined the mash and sparge water in my brew pot, and boiled for an hour.
My overall wort volume was pretty much right on (.75 gallon)/
To correct this, would I only need to boil longer to evap more water, causing my OG to increase? However, then my wort volume would be low.
I plan on buying some tincture of iodine before the next batch to be sure conversion is complete, perhaps there were still starches left to convert when I sparged.
I guess I can't complain a whole lot, as long as I'm happy with the taste, but being a rather technical guy, I'd prefer to be able to acheive the predicted outcome.