Dennerle CarboPOWER E400 Operating Instructions Manual page 25

Adjust the CO2 supply in small steps over several days until the desired CO2 content has been reached. Please note: The more
the water surface is moving, the more CO2 is driven out of the aquarium.
• Close the needle valve (turn clockwise).
CAUTION: Precision thread, tighten gently.
• Reusable CO2 bottles: Open the bottle valve slowly. The bottle pressure manometer shows approx. 60 bar at room tempe-
rature. [19]
• Turn the control knob on the pressure reducer in the " + " direction until the operating pressure gauge shows approx. 1.5
bar. [20]
• Open the needle valve until the first bubbles come out at the bottom of the flipper.
Special Edition: The magnet valve must be open.
• Set the desired bubble count by turning the needle valve.
TIP: Fine adjustments can also be made by slightly increasing or reducing the operating pressure in the range of 1-2 bar.
• 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. [21]
• Pour the entire contents of the ampoule into the test container – the enclosed pipette can be used for this. [22]
• Carefully turn the test container over and fix it vertically in the aquarium in a clearly visible place with a slight water flow.
[23]
• Stick the „CO2" colour comparison scale on the outside of the aquarium window. [24]
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. [25]
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.
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