Terrdrakon NPK balls aquamax

Long-term fertilizer balls for all aquatic plants

For specific refertilization of an equipped aquarium

  • With valuable, air-dried clay from Sri Lanka
  • Filled with high-quality NPK fertilizer (nitrogen, phosphorous, potassium)
  • Contains numerous minerals, especially iron
  • Ideal for all aquatic plants requiring nutrients
  • Every single ball is carefully made by hand

Clay balls have been used as fertilizers since the pioneering days of fish keeping, but since then seem to have been somewhat forgotten.

The plants drive their roots into the clay balls and thus obtain the necessary nutrients directly from the Terrdrakon NPK fertilizer balls. The water-resistant clay prevents the fertilizer from being released immediately to the environment and to the aquarium water. Nitrates and phosphates in particular thus remain where they belong: in the plants!


Depending on the size of the plant, press 1 - 3 Terrdrakon NPK balls into the substrate next to or underneath the plant to be fertilised. The aquarium plants push their roots through the balls very quickly. The balls can be evenly distributed in the substrate even when the aquarium is re-equipped. Please do not use more than 3-4 balls per 100 l of water for this.

Refertilisation is necessary every 3 to 6 months depending on the growth rate and quantity of the plants.

Please insert the balls into the substrate immediately. They are not intended to lie in the water for long periods, as otherwise they soften up, dissolve and can then no longer be inserted in the substrate. Removal of the remnants of the balls is then very time-consuming.


Clay is a natural product and essentially consists of swellable (alumino-)silicate layers (chemical formulae in varying amounts: SiO₂, Al₂O₃, Fe₂O) with ion exchange possibilities.
250 mg NPK fertilizer per ball: 14 % N (5,5 % N nitric nitrogen; 8,5 % N ammonical nitrogen); 7 % P₂O₅ neutral-ammonium-citrate-soluble and water-soluble phosphate; 17 % K₂O water-soluble potassium oxide; 2 % MgO magnesium oxide; 0.02 % B Bor; 0.01 % Zn zinc.

* The growth rate of the plants always depends on several factors. A plant always needs sufficient quantities of all growing media to thrive. Even when the water is well fertilised, plants may suffer from deficiencies and stagnating growth if the nutrients are absent in the root area.


48 g (10 balls)

10 of 15 reviews

5 out of 5 stars






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18 February 2013 08:59

Sehr gut zu handhaben....

Sehr gut zu handhaben.

21 March 2013 08:38

Seit Jahren gute Erfahrungen. ...

Seit Jahren gute Erfahrungen.

23 March 2013 10:21

ich verwende die Kugeln schon ...

ich verwende die Kugeln schon Jahre und habe bisher immer gute Ergebnisse bei meinen Pflanzen gehabt.

26 March 2013 13:37



27 March 2013 05:23

Super gut für starkzehrende Pf...

Super gut für starkzehrende Pflanzen

28 March 2013 07:43

Gute Düngekugeln für besseres ...

Gute Düngekugeln für besseres Pflanzenwachstum

3 April 2013 11:24

Ich verwende das Produkt als z...

Ich verwende das Produkt als zusätzlichen Dünger im Wurzelbereich, zusätzlich zu Ferrdrakon.

9 April 2013 16:09

Sehr gut um den Bodengrund auf...

Sehr gut um den Bodengrund aufzuwerten

13 April 2013 14:08

Ein sehr guter Dünger...

Ein sehr guter Dünger

15 April 2013 10:25

Nutze diese Düngekugeln für Ec...

Nutze diese Düngekugeln für Echinodoruspflanzen und bin schon nach kurzer Zeit sehr von dem Produkt überzeugt. Pflanzen wachsen deutlich merkbar besser.

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