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Fig. 2:
Sulphur-Nitratereductor 400 beside a filter tank or an aquarium:
4. Y-piece (not for sulphur version)
5. Adjustion valve for water flow
6. 6/4 mm tube (not for sulphur version)
7. 8/6 mm tube (water outlet to drip counter)
8. T-piece for bypass
9. Pressure line
10.) Filter tank or aquarium
11.) Circulation pump
12./13.) Power plug
1.
Product description
The AB Aqua Medic Sulphur-Nitratereductor consists of the reaction vessel (height = 37 cm,
volume approx. 2.3 l).
The inner basket of the reaction vessel is filled with sulphur beads and Hydrocarbonate. In the top
of the filter, the circulation pump is placed (the pump has a capacity of 300 l/h).
2.
Theory
In the AB Aqua Medic Sulphur-Nitratereductor, the aquarium water is treated under oxygen
conclusion. With the absence of oxygen, many bacteria are in the position to use nitrate as
replacement of oxygen for breathing.
The oxygen is used for respiration, the nitrogen is separated into the water. Nitrogen gas (N2) is
completely harmless as a natural component of air.
Thus, the decomposition of nitrate is a pure breath procedure. Additionally, also the bacteria need
food as any other organisms. For this reason, the nitrate-reducing bacteria must be fed. The
sulphur beads serve as food which are used at the same time as settlement substrate. Sulphuric
acid develops as a waste product. In order to neutralize this, the Sulphur-Nitratereductor contains
calcium carbonate (Aqua Medic hydrocarbonate, medium). The developing sulphuric acid is
converted into calcium sulfate, which enriches itself in the water in the long run.
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