First, add SubQ fluids as a parameter in the fluids section. Go to settings>Parameters>Add new

Then add SubQ fluids as a new parameter in the 'Fluids' section - set the picker type to be 'Numeric,' pick your min and max values and press 'Save.'

Next, go to your Whiteboard and add new the fluids order:

Set the frequency to continue every (x) hour as desired and In the "Instructions" prescribe the fluids required. 

When the nurse executes the treatment, the following will appear, and the treatment can be checked off.