Maybe I didn't ask the question right because I'm not getting any help here so I'll try again.
When I'm trying to find out what the ppm in in my reservoir is
My CF meter gives me two readings. One is by EC x 700 = ppm and the other is EC x 500 = ppm If my EC is reading 0.6 which calculation do I go by when I'm checking my nutrients. I'm trying to follow what others done in their grow log for example if someone post that during 1st week of veg the nutrient ppm should be between 800 and 1100 ppm. The difference between the two calculations ( x 500 or x 700) is a difference 240 ppm. I hope your following me because I'm totally without knowledge on which formula to use to check my nutrient strength. I don't want to over feed or under feed my plants so some help on this would be appreciated.