Just finished (phew! Only 10 hours!) brewing the massive 1.115 imperial stout tonight. I had accounted for grain absorption, but as I finished filling my first 20L fermenter and heard the march pump straining, I knew I had forgotten to take into account the absorption rate of nearly 1.5 pounds of hops. How does one calculate that exactly?
Furthermore, WHY does it always rain rain rain every brew day?