Treat 10.5 gallons of medium hard water with 18 grams of Calcium Bicarbonate. Mash in grain. Follow a mash program of 50 minutes at 50C, 20 minutes at 58C, 40 minutes at 65C, 90 minutes at 70C, and a mash off for 15 minutes at 77C. Sparge for about an hour and a half. This will yield about 19 gallons at the end. (runoff gravity of about 1.010). Boil down to a volume of 15 gallons (about 3 hours and 20 minutes.) Add 200 grams of Hallertaur pellets about 2 hours into the boil. Cool and pitch yeast.