Originally Posted by
creeperpark
Gardo, my friend, Please don't think that I'm challenging you bro. I have a lot of respect for you and the others. The difference between TDS and EC meter. EC can't determined organic matter and TDS Total Desolved Salts meter can! That's why EC isn't accurate with organic substrate and will give a false reading. EC can't read Blood meal! Urea is another good example of this. It dissolves in water with a high concentrations but it has no EC so there is no correlation! However TDS will read them in ppms. Total dissolved solids (TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid in molecular, ionized or micro-granular suspended form.
The pH run-off is important to me as an diagnosing tool!
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