Nov 14, 2023 · Introduction to 500L Fermentation Tanks. 500 liter fermentation tanks enable efficient, consistent beer production at a small to mid-size craft brewery scale. Key features of 500L fermenters: Batch capacity around 500 liters or 120-150 gallons; Optimized for ales and lagers at 5-7 barrel scale; Shorter fermentation time compared to smaller tanks