ThrowMeOut
Member
Hi all, long time lurker first time poster.
I'm trying to figure out if there is a way to within reason calculate the EC (or PPM, TDS, whatever flavor you may choose) of a nutrient product based off it's label composition & reported SG/Density (mostly gotten from MSDS info).
(I understand this changes from batch to batch and that reported product composition doesn't accurately match their actual composition)
I've read and digested pretty much all I can find on here and in various corners of the internet on how to attempt to calculate EC, read all the threads there are from Renfro and many others, as well as what i can digest out of hydrobuddy's documentation.
From what I can gather, aside from trying to back-build how Hydrobuddy does it, you'll never really accurately get the calculated PPM or EC to match measured PPM/EC?
I've gotten to a point where I can within a margin of error calculate elemental EC/PPM and my calculations seem to match other people's work, but as I would imagine most people who have delved in to this subject have found, it never matches up with what we get when physically measuring EC.
TLDR, just wondering if anyone has ever figured out a somewhat simple yet within reason accurate way to match measured EC with elemental EC?
Side note: I also realize this is a relatively contested subject and that EC measurements are best used as a reference once you have a grasp of what your plants actually *want*
I'm trying to figure out if there is a way to within reason calculate the EC (or PPM, TDS, whatever flavor you may choose) of a nutrient product based off it's label composition & reported SG/Density (mostly gotten from MSDS info).
(I understand this changes from batch to batch and that reported product composition doesn't accurately match their actual composition)
I've read and digested pretty much all I can find on here and in various corners of the internet on how to attempt to calculate EC, read all the threads there are from Renfro and many others, as well as what i can digest out of hydrobuddy's documentation.
From what I can gather, aside from trying to back-build how Hydrobuddy does it, you'll never really accurately get the calculated PPM or EC to match measured PPM/EC?
I've gotten to a point where I can within a margin of error calculate elemental EC/PPM and my calculations seem to match other people's work, but as I would imagine most people who have delved in to this subject have found, it never matches up with what we get when physically measuring EC.
TLDR, just wondering if anyone has ever figured out a somewhat simple yet within reason accurate way to match measured EC with elemental EC?
Side note: I also realize this is a relatively contested subject and that EC measurements are best used as a reference once you have a grasp of what your plants actually *want*
though that does remind me of one thing I've always wondered, why is N always considered "special"? By that I mean, N is typically present as NH4, NH3 etc yet everywhere I've seen is treated as 100% N and not treated the same way K (K20 converted to elemental K) and P (P205 converted to elemental P) are treated? Does this have to do with how plants absorb nitrogen & other oxides needing to be broken down first?