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Re: Fertilizer with Potassium

> Date: Tue, 18 Nov 1997 17:08:34 -0600
> From: Guillermo Vega-Toro <guillermo_vegatoro at stercomm_com>
> Can anyone recommend a good commercial fertilizer with Potassium?

Duplaplant tablets (added after biweekly water changes) contain
potassium.  Tablets in conjunction with the daily drops you are
already using should be the only fertilizers you need.

Duplaplant fertilizer tablets

Used at each water change to add trace elements that have long term
stability.  Note: for the analysis, a tablet was dissolved in distilled

Ca   5.5 ppm    Mg   0.3 ppm    Na 116.0 ppm   K  2490.0 ppm    P    0.3 ppm
Al   0.4 ppm    Fe 234.0 ppm    Mn  36.8 ppm    Ti   0.6 ppm    Cu   0.2 ppm
Zn   0.6 ppm    Ni   3.7 ppm    Mo   0.7 ppm    Cd  <0.1 ppm    Si   5.7 ppm
Cr   0.1 ppm    Sr  <0.1 ppm    B    6.7 ppm    Pb   0.1 ppm    V   <0.1 ppm

Duplaplant 24 daily drops fertilizer

Used daily to add trace elements that are either are unstable or are toxic
in large doses.

Ca   1.5 ppm    Mg  <0.1 ppm    Na 484.0 ppm    K   <0.1 ppm    P    0.7 ppm
Al   0.5 ppm   Fe 1180.0 ppm    Mn   1.3 ppm    Ti  <0.1 ppm    Cu   0.1 ppm
Zn   0.1 ppm    Ni   0.2 ppm    Mo  <0.1 ppm    Cd  <0.1 ppm    Si   0.8 ppm
Cr   0.2 ppm    Sr  <0.1 ppm    B    2.0 ppm    Pb   0.5 ppm    V    0.2 ppm

Duplagan water conditioner

Used at each water change to add organic acids beneficial to slime coat
production and to add some trace elements that have long term stability.
Note that the inorganic acids are "natural" versus artificial polymers used
in Novaqua type products (according to the local fish store).

Ca  31.0 ppm    Mg 509.0 ppm    Na  54.0 ppm    K   10.0 ppm    P    1.0 ppm
Al   0.5 ppm    Fe   0.3 ppm    Mn  <0.1 ppm    Ti   0.1 ppm    Cu  <0.1 ppm
Zn   0.3 ppm    Ni   0.1 ppm    Mo  <0.1 ppm    Cd  <0.1 ppm    Si   2.0 ppm
Cr  <0.1 ppm    Sr   0.3 ppm    B   <0.1 ppm    Pb   0.3 ppm    V   <0.1 ppm

The metal assay was done by the Soil Testing Laboratory at Colorado
State University using an "Inductively Coupled Plasma Atomic Emission
Spectrometry" technique.  It basically takes a sample and adds enough
heat to get any metals to an their atomic composition and runs a spectrum
on them (this description may be a little hazy - my wife is the chemist
in the family; I'm just an EE). The instrument is very reliable and is
accurate to the pico-molar range (I rounded the numbers to the nearest
0.1 ppm).  It only does metals, so we had no data on Nitrogen.  As far
as we know, there are no nitrates or phosphates in the Dupla products.
This is via LaMotte nitrate and phosphate test kits at home.

Anti-QYNGA: You need both Duplaplant tablets and Duplaplant-24 drops
for fertilizing.  They compliment each other; they are NOT the same
thing. Use as directed and measure Fe.  If it is too high, adjust tabs
or drops accordingly. We start adding drops three days after a water
change since the tablets seem to have enough iron to last that long.