Let me try to give you some basics on the ppm. First I check the ppm of my base water, usually 160. Then I add nutrients, etc and check it again....960. Subtract 160 from 960 and you have a nutrient value of approx 800ppm. As they drink the solution down from say 4 gal in a bucket to 3 gal, the ppm will probably go up, as the nutrients become more concentrated. Some people top of the reservoir with water, some with a weaker nutrient solution. It's a good thing to check ppm daily and keep notes if you are new to dwc. Eventually you can do it by feel or recipe of your design.
Hope that helps clear things up, if not I'll be glad to try again.
Edit: BTW, I never check pH, haven't in over a year. A buffered nutrient brand was a game changer in my lazy grower style.
Hope that helps clear things up, if not I'll be glad to try again.
Edit: BTW, I never check pH, haven't in over a year. A buffered nutrient brand was a game changer in my lazy grower style.