DRAK Duradrakon

DRAK Duradrakon

  • Re-mineralising salt mixture for very soft water
  • Raises total hardness and carbonate hardness
  • For RO water and rainwater
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This hardening salt mixture is suitable only for Aquarium water with adequate free CO2 (preferred is when the CO2 is produced by a controlled CO2 system) and where there is a pH-value wide under 7 (preferred RO - as well as DM-water), because otherwise some components only disperse slowly or not at all!

Pure reverse osmosis-water is not suitable, except for a few special cases, (pure circulation-pools, black water biotope), for direct application in the aquarium. The few available mineral substances that it still contains are too quickly used-up. To supply fish and plants it is therefore sensible and correct, that the water used should be hardened to a total hardness / carbonate hardness value of 1 - 3 ° dH. Those that do not wish to do this by blending together with drinking water or that are not in a position to do it, (e.g. the origin water would be too polluted!), will need a hardening salt mixture, that supplies the water with a pre-defined dosage of mineral substances.


According to the situation, whether one prefers to increase the total hardness or the carbonate hardness, are the dosages (slightly) different:

To increase about 1 °d TH you will need approx. 2.8 g Duradrakon / 100 l water.

To increase about 1 °d CH you will need approx. 3.6 g Duradrakon / 100 l water.

With a dosage of approx. 3.6 g Duradrakon per 100 l water, the following amounts of important ions are added:
22.3 mg/l hydrogencarbonate, 6.2 mg/l calcium, 5.3 mg/l sulfate, 3.6 mg/l chloride, 2.0 mg/l sodium, 1.9 mg/l magnesium, 0.8 mg/l potassium, trace elements



Aquarium plant fertilizers, water conditioners, remineralizing salts and supplies for marine aquaristics made by a specialist. Dr. Andreas Kremser (DRAK) offers a wide product range for planted aquarium enthusiasts and aquascpapes. Besides micronutrient fertilizers like his Ferrdrakon complete iron fertilizer, he offers macronutrients as well as micronutrient fertilizers for special purposes like the KramerDrak - complete iron fertilizer for strongly lit tanks. 

General information

Item no.
EAN 4260169961758
Weight 0,60 kg
Shipping weight 0,60 kg

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