Void Tanks is a tiered storage system for water and lava. Each tank ranges from stone to gold to iron to diamond and holds 4, 16, 64 and 256 buckets in that order.
To fill the tanks simply right-click with a fluid source and the tank will start to fill. They can also be combined with tubes or other fluid transport systems found in other mods to automatically fill the tanks faster. And the fluid can be taken back out with the same methods!
The void upgrade feature of this mod can be applied to any tank by right-clicking with it in hand. This will cause any excess fluids to be deleted after the tank has reached capacity.
And the upgrade can just as easily be removed by right-clicking while holding shift.