µS/cm EC Meter Help Needed Understanding, High Tap Water Levels. Drip w/rooted clone

hey all, im new to this hydro stuff but am learning quickly. i've spent all day trying to understand the µS/cm idea and the "conversion" factor. from what i understand your "conversion" factor is determined by your EC meter, correct? but I'm still at a loss as to how a conversion fator is necessary. what does your µS/cm * your conversion factor give you? PPM? I've also read EC is the most accurate way to go. So My next set of questions is directly regarding my readings given by my µS/cm EC meter. My resirvoir is around 1580 µS/cm. my tap water reads approx 400 µS/cm. As i understand this means my approx PPM is 590. I have a successfully rooted clone at about 2.5 weeks right now, but am having what i believe to be nutrient burn issues. my PH levels are bang on at 6.0 to 6.5. I am on a well water system, so i guess my question is, do i need to work with lower EC readings in my resivoir because my tap water EC readings are so high? i've read that A Reverse Osmosis system may be needed, but i cant quite afford one yet. any and all help appreciated. thanks in advance guys and girls !

PS: Im doing a drip system in hydroton

I can't tell you the technicals of ec conversion but as I understand it, all these meters measure ec then convert it to ppm. Doesn't your meter give you a ppm reading? Also as I understand it, there are different methods by which to convert ec to ppm and each meter company is using one or another. So, if you want to follow, say, a nute schedule from a nute company that gives you ppms, you first have to know that their ppms are the same as yours, that is whether they are using the same conversion factor. Many of the nute tables tell you that in the fine print. As for your well water, you need to think of its ppms as a base of zero and measure nutes from there. If your water is 200 ppm and you add nutes and it reads 400ppm, you have 200ppm of nutes. By the way, if water is over 200ppm they say an ro won't work unless you run water through a softener first.