Hi I'm still learning a lot and know basically very little. I'm wondering if someone can help me out, I've looked online but it's giving me more things I don't understand, I've tested my water ec which is 390 ish which is the top pic, the second is the ec of my rez and third ppm of my rez using autopots and megacrop with photoperiod blue cheese, everything is going smoothly so far I'm just trying to learn more about ec etc, I've just been using the greenleaf calculator with no issues. But yiu may aswell Learn all you can eh. Cheers