Does anybody know an equation for the evaporation of water during boil? I have been using about 6 gallons of water thinking there was a bunch of evaporation, my beer has been tasting a little week and it is been 1 primary, 2 secondary, and 3 in bottles(so its not "green"). It is a Rogue dead guy clone I just think I have been using too much water in my brews, and I did the same with my brown ale in bottles and my hefe in the primary. It doesnt taste bad I am just a little disappointed. Any suggestions?