The following are two examples of how the Mist King can be set up for multiple tanks.
The first example uses "T" sections in the line and the supply line will return to a valve that connects to the power source on the pump to cycle water back to the pump and reduce the chance of water dripping from the nozzles after running.

The second example is more basic and connects each nozzle in a series and ends at the last nozzle. Note that all nozzles except the last one would have a T section built into the nozzle or supply line and the last nozzle becomes the end of the supply line.
Nozzle of both types and T sections are available from Mist King directly or suppliers such as Josh's Frogs.