The ions in your
nutrient solution conduct an electric current. This conductance is expressed as a
"Mho" Since the measure of conductivity is so small, it is expressed as "milliMhos/cm," a
measurement of conductivity through one cubic centimeter of solution. And is read as ppm or
parts-per-million
Are you sure it says micro instead of milli. If so then you would have to move a decimal point one
way or the other but I don't know enough about metric to know. Maybe some members fluent in
metric can shed some light on the subject.
Ron