Speidel's FS-MO and AS-MO tanks are their flagship storage and fermentation tanks. Featuring a huge range of tank capacities, these tanks can be customized with a wide array of add-on features, and can be stacked to take advantage of vertical space in your facility. The FS-MO tank is the tank used for the base, and up to two AS-MO tanks stack on. Please note that with each diameter range there is a maximum total volume for all tanks in a stack shown below, due to the weight of the tanks when full.
| Tank Diameter | Maximum Total Volume of Tank Stack |
| 82 cm | 1265 Liters |
| 100 cm | 2500 Liters |
| 120 cm | 4600 Liters |
| 140 cm | 6700 Liters |
| 160 cm | 10000 Liters |
| 180 cm | 12500 Liters |
| 200 cm | 16300 Liters |
View the resource for more information on the key features of all Speidel Tanks.