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Re: Aquatic Plants Digest V4 #688

> On Wed, 29 Nov 2000 Brian Waters wrote:
> Hi James,
> Thanks for the link.  I checked my local water supply report and it said
> nitrate is at 0.05 ppm.  However, my test kit (Tetra brand) reads it at
> about 10 ppm.  I have long suspected that this test kit is not very
> accurate.  Is this confirmation?  I hope the test kit is wrong, it would
> make me feel better, because I'm always battling NO3 in my tanks, maybe it
> is not really as high as I thought?  Can someone recommend a better NO3 test
> kit?
> Brian Waters
> Columbia MO


Awhile back, maybe a year or so, I had both a Tetra and an Aquarium
Pharmaceuticals nitrate test kits, which were giving me off the wall readings,
with a 10-20 ppm difference.

I mixed up a known concentration of kno3 and RO water and checked that.  The AP
kit was dead nuts on while the Tetra kit read about 20ppm too high.  I think the
Tetra kit even cost more.

Bob Ashcraft
Pittsburgh, PA