I have a TDS meter? You dont get it? LOOK at the link I put up, EC is the only universal way of knowing what ppms you are useing. 1000 ppms on one meter could be 1400 ppms on another brand meter, but they are BOTH 2.0 EC. I have a Hanna meter, I was wondering what kind of meter Stinkbud uses.Dude, it doesn't have to be precise to the nearest thousandth decimal place. Just start off with a minimal EC level and work your way up until you see the slightest nutrient burn. Besides, a lot of it has to do with what strain you're running. If it's that important to you, get yourself a TDS meter
http://www.gardenscure.com/420/hydroponics/96521-printable-ec-ppm-cf-conversion-chart.html