I'm new to brewing and have done a few extract batches and would like to try all grain. Anyways, ive been looking at doing a biab recipe, but need some answers. If the recipe has a boil size of 7.5 gallons, does that include the grain or is that just the water? If its just the water, how much more do i have to account for per pound of grain? I'm trying to figure out what size of pot to buy. Ive got a 36 quarts pot now and hoping it is big enough for the average brew.