ReadonlygrainGrain in the tun, kilograms. Unchanged, because a decoction returns its grain.
ReadonlytempWhere the mash actually landed, °C.
ReadonlythicknessThickness after the return, litres per kilogram.
ReadonlywaterWater still in the tun, litres, after the pull's evaporation.
The mash left behind once a decoction has been returned.