Pertaining to the PMDD. I can find the KNO3 and the K2SO4 but I am having a time trying to find the chelate element mix. Well that is a lie I did find a brand at the local Hydro shop but has a 327ppm Cu and 1.0% Cl. Would not like to use these as I know Cl and have read Cu is harmful to some plants Madg. Lace in particular. Or is this a small enough dose to be of no harm? Any info would be appreciated.