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and now to really confuse things ...
if you add an organic tea to some known ppm solution of nutes, the reading will probably go down even though you added more substances/solutes and really more parts per million of stuff
the tea/organics actually will block some of the conductovity through the solution, like an aqueous insulation
this is the kind of reason why some meters up the conversion to 0.7 if they are used for agriculture/fertilizers as compared to simple salt ionic solutions which only have small ions when they derive the ppm number you see on the display from the conductance that is really being measured.
so what kind of meter, what kind of nutes ?- if the plant is older than seedling it seems like you could go up unless your adding earthjuice or something making the number lower than it really is.
i'm out before I get timed out. |