That's a lot of head space if the true amount of space is not understood.
At the same time, a couple of my old 5 gallon carboys hold 5.25 gallons / 20 liters, not 19. As long as I know this and plan for it, I'm ok.
At the same time, a couple of my old 5 gallon carboys hold 5.25 gallons / 20 liters, not 19. As long as I know this and plan for it, I'm ok.