I am assuming that the grains will hold on to a decent amount of water after the sparge. Is there a formula for figuring this out? (like... x pounds of grain = the water that is left in the tun). The reason I ask is I want to have enough mash in the pot at the end.
I am also assuming that with a FG batch there is no need to add additional water to the mash for the boil.
I am also assuming that with a FG batch there is no need to add additional water to the mash for the boil.