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Tropica Fertilizer


  1. Tropica fertilizer
    by (CLAUS CHRISTENSEN) (Wed, 5 Jul 1995)
  2. Easy RMDD Source
    by jphealy/SYSCONN.COM (Sat, 25 Jan 1997)
  3. Tropica MasterGrow
    by Dave Gomberg <gomberg/> (Thu, 01 Jul 1999)
  4. RE: TMG
    by "Wilson" <jwilson/> (Fri, 14 Jan 2000)
  5. Dupla vs. TMG
    by Karen Randall <krandall/> (Sat, 15 Jan 2000)
  6. TMG Daily or Weekly Dose?
    by Chuck Gadd <cgadd/> (Thu, 23 Mar 2000)

Tropica fertilizer

Date: Wed, 5 Jul 1995

Michael writes
> This one is for Claus Christensen:

> Yesterday I saw some Tropica plant fertilizer sold in a small
> aquarium store here in Munich. I didn't know that you were also
> selling your own fertilizer.
> Here's the big question: is it the same fertilizer you are using
>  (for the submerse cultures) in your greenhouses in Denmark?
No - it is not! There is a good reason for that!
Of cause we have used all our experience and knowledge from
growing aquarium plants in 25 years, but there is a big difference
between aquarium and Tropica's submerse culture. In an aquarium
you have fish and all the space is not filled with plants!
When you feed the fish and their excrements are decomposed in
the aquarium, a lot of plants nutrients are released! Too much of
some nutrients (phosphorus and nitrate) and to little of others
(potassium, iron, manganese and other micro-nutrients).
We tested many aquariums (water analyses and dynamic factors
as water changes, quantity of fish, plants and the consumption
of fish food).
That information we combine with our knowledge about the
average optimum of nutrients for aquarium plant growth!
A computer model of the dynamic in an average aquarium was
build - and used when I with biologist made the recipe for
Tropica Master grow.

In the Tropica Master grow fertilizer we have naturally only
added what there is missing in an aquarium!
After that we have tested our recipe in 5 test aquariums at
Tropica and in a long time test among 50 aquarium owners in
many different countries!

> I know you probably won't be able to tell us the constitution
> of the fluid, but maybe some features?
It is no secret! We tell it in the declaration on the bottle
(K 0.79%, Mg 0.39%, S 1.01%, B 0.004%, Cu 0.006%, Fe 0.07%,
Mn 0.04%, Mo 0.002% Zn 0.002%. HEEDTA and DTPA as celators).
We have the idea: "aquarium owners have the right to know what
they put into their aquarium"!

Claus Christensen (Tropica)

Easy RMDD Source

by jphealy/SYSCONN.COM
Date: Sat, 25 Jan 1997

Hello Again:
I meant to add that Tropica is now exporting its aquarium plant
fertilizer to the US. I guess you'd call it Rich Man's Dosing Drops. In
any event, it can be ordered at I just checked
this site out and they have a pretty good collection of Dupla supplies

Justin in Savannah

Tropica MasterGrow

by Dave Gomberg <gomberg/>
Date: Thu, 01 Jul 1999

I just struggled home from the bonded warehouse with over 500 bottles of
Tropica MasterGrow (all sizes) so if you have been patiently waiting the
wait is nearly over.   They should go out Tuesday (with the SAEs).
- --
Dave Gomberg, San Francisco  
The latest in CO2 news: 
Tropica MasterGrow in the USA: 
- -----------------------------------------------------------------


by "Wilson" <jwilson/>
Date: Fri, 14 Jan 2000

> From: "Ross E. Gemmill" <>
> For those of you who have converted, how did it go?  Any
> comments on the
> amount of TMG used and how often, would be appreciated.

I switched from the full Dupla treatment to TMG on 8/8/99. Other than TMG
seems to contain less K than the Duplatabs, it went fairly well. I add 75ml
TMG per week and change 50 gallons of water every two weeks in my 225 tank.

Jon Wilson

Dupla vs. TMG

by Karen Randall <krandall/>
Date: Sat, 15 Jan 2000

>My supply of Dupla ferterliser is running out so I am switching over to
>TMG.  My tank is a 90 gallon Dupla setup with heating cables, CO2
>injection, metal halide lights and a trickle filter.  It's been running
>for 18 months and doing very well.  Maintence includes, a 100 liter
>water change every other Sunday with 2 of the 50 liter DuplaPlant
>tablets and a daily regime of 5 DuplaPlant24 drops. 
>For those of you who have converted, how did it go?  Any comments on the
>amount of TMG used and how often, would be appreciated.

I was one of the first "converts" to TMG, well before it was available in
this country.  I was given a bottle by Claus Christensen years ago, and
have been using TMG ever since.  I was certainly not unhappy with Dupla
products, but for my plants with my tap water chemistry, TMG was just a bit
better.  (It sounds like George and Karla are finding that with their water
conditions the opposite is true)  I am basically a very lazy aquarist, and
would rather not have to does my tanks daily.  The fact that TMG uses good
chelators that easily keep my iron levels up between doses is also a plus
in my book.

As far as dosing is concerned, as you've probably read here a dozen times,
every tank is different.  I took Claus' advice when I first strated using
TMG, and began dosing at half the labelled amount, and worked up slowly
over time.  My tanks are brightly lit, CO2 injected fast growth tanks.  In
the one that has slightly less really fast growing stem plants, I dose at
just over the recommended amounts.  In the other tank with more fast
growing plants an enormous, very hungry 'Rubin' sword, and a large nutrient
sucking tiger lotus I find that I have to use close to twice the amount
suggested on the label, or the less competitive plants lose out.


TMG Daily or Weekly Dose?

by Chuck Gadd <cgadd/>
Date: Thu, 23 Mar 2000

> I just received my first batch of TMG, Someone on the
> list said they dose with this daily. Can someone tell
> me the best way. If daily, do you mix a weeks worth
> and divide by 7?

I use a daily dose.  I just use a 10 ml syringe, to measure out
the right amount, and add it slowly to the tank.  I have a 
sump setup, so normally I just squirt it right into the sump tank.
But I've added it directly to the tank without trouble, just
be careful not the squirt it right at any fish!   I got a handful
of the syringes at the local pharmacy for free.  They give them
out for measuring oral dosages of liquid medicines.

I'm currently adding 6 ml per day for my HEAVILY planted 75g.  I 
started at 4 ml per day, and have increased it each week due to
visible signs of iron deficiency (mainly from my Amazon Frogbit).
At 4 ml, it was very noticeable.  After a week with 5 ml daily, it's
only barely noticeable, but still not quite right.  I'm betting 6 ml
per day will be the magic number.  The only algae is some green
spot on the glass, and some green spot algae on some of the older
Anubias leaves.

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