In article ,
Margolis wrote:
Sorry, but you need to read the directions then ;op They are more than
accurate enough for what we are dealing with here. There is no need to
spend $100 on a lamotte test when we are not in a laboratory setting. And
there are no digital meters for nitrate.

I read the directions seevral times. I've already pointed out the flaws,
but to repeat "tests are affected by nitrite" but they don't say how.

Stock calibrated nitrate solutions do not match either FW or SW chart.

A 200 ppm tank read zero for 24 hours with seevral etsts then read 80ppm
a day later whilke LaMotte said 200 all along. While you may have different
experiences, these are mine. WHen they work they give you a rough idea of
where your nitrates are, modulo error from nitrite which is an unknown.

Many people on APD have digital nitrate meters. Maybe Tom Barr can talk
about his if he pops his head in here.


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