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Re: [APD] High NO3 reading
Maybe a lack of something else is limiting nitorgen uptake?
Thus, "high" nitrate readings but plants that appear to not
be getting enough.
--- Tomoko Schum <tomokoschum at knology_net> wrote:
> Hi y'all,
> I am puzzled about NO3 levels that I am getting from my
> test kits lately. I
> tested my water a number of times with relatively new
> Pharmaceutical's test kit and a brand new Salfert's test
> kit, and the
> results are consistently high around 30 to 40 ppm. I
> have been sticking to
> Tom Barr's recommendation on the tank maintenance and I
> never had a problem
> until this year (this tank was set up in 2000.) I
> stopped adding KNO3 for
> two weeks or so and the NO3 level dropped to 10 to 15 ppm
> range, but some of
> my plants look really nitrogen deficient now. I think my
> fish load is
> moderate (20 cardinal tetras, 5 harlequin rasboras, three
> or four coridoras,
> two SEA and a few more small tetras) for a heavily
> planted 75 gallon tank
> (equipped with four 55W PC's and a pressurized CO2
> system.) I have not
> changed fertilizing or fish feeding regimens over the 5
> years. Is it time
> to clean substrate (100% Fluorite) drastically or change
> out my 5 years old
> media in my Eheim 2026? I cannot really figure out where
> my extra nitrate
> is coming from. My tap water contains less than 5 ppm of
> nitrate (it
> usually read 0.)
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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