Grow little guys... grow.
Join Date: Mar 2008
Location: Chicago, IL
Does NO3 degrade in solution over time?
I'm curious how NO3 in solution can degrade over time (if it can)....
Here's what I experienced:
I went to test the nitrates in my tanks today. I usually test against a 5ppm reference solution so that I can calibrate my eyes to the testkit color. Thus, I keep a 5ppm reference solution in an amber Boston-round bottle on the shelf at room temp. I made this particular NO3 reference many months ago.
Today, when I tested my aquarium samples (and reference) with a new NO3 testkit, the reference solution showed 0ppm with the testkit.
Just to verify things, I made a new 5ppm reference solution and I also made a new batch of my KNO3 concentrate solution which I dose the tanks with. Then I tested the reference solution with the NO3 test kit and I also tested 10gal of water dosed to 5ppm with my KNO3 concentrate solution.
Both samples showed 5ppm with the test kit. So, I'm curious why the old 5ppm reference solution that I made several months ago no longer had any NO3 (that was detectable by the testkit)?
Is this type of degradation expected?
Jeremy Squires, Toronto, ON
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