In my place they made a hard work to dissolve a fake for a good ppm reading.
DIY!
My first attempt was failed with pharmacy spray "35ppm Ag+9999" on the label.
It was colourless liquid a little opalescent. The TDS-meter reading was 50ppm.
There was no sign of she-male metamorphosing and the clone flowering was finished as a female.
DIY!