Duradrakon

Hardening Salt Mixture for RO-Water - Improved Concentrated Recipe!

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!

Introduction

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.

Dosage

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 ca. 3.0 g Duradrakon / 100 l water.

To increase about 1 °d CH you will need ca. 3.75 g Duradrakon / 100 l water.

23.7 mg/l hydrogencarbonate, 6.6 mg/l calcium, 5.7 mg/l sulfate, 3.8 mg/l chloride, 2.2 mg/l sodium, 2.0 mg/l magnesium, 0.9 mg/l potassium, trace elements

To assist ease measurement of dosages here are some measures commonly used in the kitchen

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