How It Works - Dennerle CarboNIGHT M400 Notice D'emploi

Please note: The bubble count reacts to changes on the pressure reducer with a time delay (the hose acts as a pressure
buffer). Therefore, adjust the bubble setting in small steps and always wait a few minutes until the new setting has
stabilised.
Note: If the control knob is turned in larger steps of approx. 1 turn towards „ - „, the pressure reducer releases the
excess pressure through a small vent hole – this produces a short hissing sound. This venting process serves to quickly
stabilise the new bubble count.
• Check the bubble count frequently in the first few days and readjust if necessary. Later, it is generally sufficient to check
the bubble count once a week.
6 Using the CO2 long-term test

6.1 How it works

The CO2 special indicator reacts with different colours to different CO2 contents:
• Blue = too little CO2
• Green = optimal amount of CO2 (approx. 20 mg/l)
• Yellow = too much CO2
The CO2 content in the aquarium can be read in mg/l directly from the colour comparison scale.
6.2 Performing the CO2 long-term test
• Shake the indicator ampoule until there is no fluid in the neck. Twist off the seal. [19]
• Pour the entire contents of the ampoule into the test container – the enclosed pipette can be used for this. [20]
• Carefully turn the test container over and fix it vertically in the aquarium in a clearly visible place with a slight water flow.
[21]
• Stick the „CO2" colour comparison scale on the outside of the aquarium window. [22]
Please note: The colour display reacts to changes in the CO2 content with a 1-2 hour delay, as the CO2 needs some time to
diffuse into the indicator fluid. Therefore, increase the amount of CO2 in small steps of a few bubbles/minute over several days
until the optimum CO2 content is reached.
6.3 Usage as a pH long-term test
Provided that there are no other substances in the water that have a significant influence on the pH level (e.g. humic acids,
nitrate, pH-minus preparations), the CO2 long-term test can also be used to monitor the pH value in the aquarium.
To do so:
• Measure the carbonate hardness (KH) of the aquarium water (tests available in specialist shops).
• Stick the corresponding „pH" colour comparison scale on the outside of the aquarium window. [23]
Using the colour scale, you can now read the pH value of the aquarium water.
Measure carbonate hardness regularly and always use the appropriate colour scale.
6.4 Replacing the CO2 special indicator
In order to ensure the fastest and most accurate colour reaction, we recommend filling the test container every 4-6 weeks with
fresh CO2 special indicator fluid. You can pour used indicator fluid down the drain in your home.
6.5 Cleaning the CO2 long-term test
Use warm water and soft sponge. Do not use cleaning agents.
6.6 Special information
• The CO2 special indicator is safe and free of chemical solvents. Nevertheless avoid prolonged skin and eye contact.
• Indicator liquid that accidentally enters the aquarium is harmless for all aquarium inhabitants.
• Store indicator liquid away from sunlight, heat and frost. Always store ampoules in a place that is not exposed to direct
light. Filling level due to technical reasons.
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