Shut off IC40 while draining?

[jgofnj]

I have the IC40 and it is wired with my pump. I need clean to backwash and drain some water, so I will be running the pump for about 30 minutes while no water will be flowing through the SWG. I currently have it set at 40%.
Since there is no physical off switch on the SWG (and I do not have any automation, if that makes a difference).

Should I :
1) Reduce the output to 0% (only way I know how to turn it "off"),
2) Unplug the cable at the power box?
3) Do nothing and not worry about it?

 

[ajw22]

The flow switch should sense no water flow and turn the cell off.

But to be safe and not rely on the flow switch set the % to 0.

 

[jgofnj]

The flow switch should sense no water flow and turn the cell off.

But to be safe and not rely on the flow switch set the % to 0.

Thanks, that sounds like the easiest method.