Re: Fertilizer comparison

To: Aquatic-Plants at actwin_com
Subject: Re: Fertilizer comparison
From: Hardjono.Harjadi at Eng_Sun.COM (Hardjono Harjadi)
Date: Thu, 21 Mar 1996 09:43:23 -0800


>
>From: Kevin Conlin <kcconlin at cae_ca>
>Date: Wed, 20 Mar 1996 13:53:49 -0500
>Subject: Fertilizer comparison

[ snip ]

>
>What's interesting about this table is that it shows that Dupla Drops are
>a source of iron only; they are not a significant source of any other
>trace element or micronutrient.  If you also use Duplagan and Dupla tablets,
>Mg and Mn are supplied (as well as the macronutrient K), but B, Mo, Zn,
>and Cu are still missing.

This statement is not true. Here is the Duplaplant tablet composition courtesy
of George Booth:


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
water.

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


Hardjono