Aqua Medic reactor 1000 Betriebsanleitung - Seite 4
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1. CO2 pressure gas bottle station.
2. pressure regulator regular
3. solenoid valve
4. pH Computer
5. adaptor
6. bubble counter with non return valve
counter
Figure 2 shows the reactor 1000 in exterior fixing together with a complete CO2 supply
and steering by Aqua Medic. The water is leaded into the reactor coming from the
exterior filter (not shown). The pH-Computer measures the pH-value in the aquarium
and switches on the CO2 supply via the solenoid valve according to demand.
This way one can keep a constant pH-value in the aquarium (e.g.pH 6,5-6,8) in plant
aquariums. Nevertheless the number of bubbles on the fine needle valve of the pressure
regulator is not to be fixed on too high values. The risk is given that the pH-value in the
aquarium decreases too much when the solenoid valve fails ( e.g. blocked by dirt).
Increasing the hardness of carbonate
The carbonate hardness in aquarium water, both fresh- and marine water, is to be at 4 –
6 minimum. It is difficult to stabilize the pH-value when it is under the limit. Acids which
reduce the carbonate hardness are permanently produced by biological procedures
(e.g. germ reaction).Another carbonate hardness consumer is the filtering over peat, or
the setting in of other hard acids. A weekly control of the carbonate hardness is to be
executed in case of peat filtering. If the value is under 4 KH in freshwater and under 6
KH in marine water, the carbonate hardness is to be increased. Therefore we
recommend the KH tablets by
Maintenance and care
The right quantity of CO2
The quantity of CO2 dissolved in the water depends on the carbonate hardness. The
higher it is , the more CO2 gas is dissolved – at the same pH-value. The harmfullness
limit of the CO2 concentration also depends on the carbonate hardness.
A so-called free carbonic acid ( dissolved CO2 gas) belonging to it is necessary in order
that the calcium and magnesium inos ( those which build carbonate hardness in
connection with CO2 gas) keep being dissolved. The free carbonic acid belonging to it (
also called eqivalent carbonic acid) is important carbonic acid for the plants. The
equivalence between carbonate hardness builder and CO2 is stipulated from pH 7,1 –
7,4 for freshwater ( 8,1 – 8,4 for marine water). This quantity of CO2 is not dangerous for
fish, it does not depind on the carbonate hardness. The plants consume the equivalent
carbonc acid at the assimilation (photosynthesis). If it is not permanently supplemented,
aqua + KH.
7. reactor 1000
8. pH electrode
9. aquarium
10. ventilation
11. running in of water to the reactor 1000
12. outlet of water to the aquarium