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RE: agro vs. lab grade
> Date: Mon, 10 Nov 1997 21:03:19 +0800
> From: "Jonathan Uy" <5js at durian_usc.edu.ph>
> In the practical PMDD information in the Krib there were two grades of
> and K2SO4 mentioned. The agro grade and the lab grade. I like to know
> what most of the hobbyist are using in mixing their PMDD. Is there a
> difference in concentration of lab grade to agro grade? There is a huge
> price difference and I wonder if it would make any difference to the
> concentration levels in the aquarium?
The difference, I believe, is in the purity of the chemicals. Thus I would
not be concerned about the resulting concentrations of desired chemicals,
but with what else one might be adding *with* those chemicals.
I have been using agricultural grade KNO3 for a while now with apparent
success and have just purchased 50 lbs of K2SO4 for $30. There certainly
*is* a big price difference.
The very act of seeking sets something in motion to meet us;
something in the universe, or in the unconscious responds as if
to an invitation. - Jean Shinoda Bolen