I've been trying to work out what dry ferts I need to dose my nano (14ltr) Going by Nutri-Calc it comes up with the following: KNO3 0.08g/day K2SO4 0.04g/d KH2PO4 0.02g/d MgSO4 0.20g/d Trace 0.01g/d Adding this information into keymaker's calculator with another 50% on top for safety, I get in 100mls for 1ml dose per day KNO3 12g K2SO4 6g KH2PO4 6g MgSO4 3g Trace 1.5g Now looking at the outputs, it shows that for NO3, PO4 and K they go above the EI low range after the first day and go green after a week. I'm concerned about the lack of Mg shown. I know that Fe is sufficient in my tap water, but I'm unsure about the Mg concentration. Achieving 10ppm of Mg seems like I'll be adding a lot of MgS04 and would have to make a separate solution for it? Any thoughts and/or comments would be welcome.