General Hydroponics Flora Nutrient PPM Calculator

Daddy
ps, all meters measure EC convert to ppm or TDS by multipling with a factor of either 0.50, 0.65, 0.68 , 0.70, depending on the manufacturer, tis why if everyone used EC for the standard we would ALL be on the same page. kapesh
Daddynobucks Reviewed by Daddynobucks on . Explain to me TDS, PPM, EC... Can someone explain to me Total Disolved Solids, Parts per Million, and EC? I know readings are different for different nutrients/rez. sizes etc. but is there a general rule of thumb what should be what? Rating: 5