24
„ - „ (CO2 supply closed).
• Check to make sure that the seal in the connection piece of the pressure reducer and the sealing surface of the bottle
valve are clean.
• Screw in the adapter or check whether it is firmly mounted (6 mm allen key).
[7]
• Connect pressure reducer to CO2 bottle. Turn union nut until hand-tight with 27 mm spanner.
[8]
4.3 Connecting the magnet valve (only for Special Edition)
• Cut off an approx. 50 cm long piece of the CO2 hose with a straight cut.
[9]
• Connect pressure reducer and magnet valve with the hose.
CAUTION: The arrow on the magnet valve must point in the flow direction of the CO2!
[10]
• Push the hose ends all the way onto the hose connections and secure with union nuts.
• The magnet valve can be fixed in the stand cabinet using the fixing bracket.
[11]
• Connect magnet valve to time switch. The time switch makes it possible to stop the CO2 supply during the night, as plants
do not consume CO2 at night.
Tip:
Connect the magnet valve and lighting to the same time switch.
[12]
Switching states:
Power supply ON = magnet valve open
Power supply OFF = magnet valve closed
4.4 Installing the check valve
• The check valve should be installed in the hose as close to the aquarium as possible. Make a straight cut in the hose at
the appropriate length.
• Push the hoses all the way onto the hose connections and secure with union nuts.
CAUTION: The arrow on the check valve must point in the flow direction of the CO2, i.e. from the CO2 source to the diffuser!
[13]
• Connect hose to pressure reducer
[14]
or magnet valve (for Special Edition)
[15]
and secure with union nut.
4.5 Connecting the CO2 flipper
• Rinse the flipper with warm tap water (do not use a cleaning agent!).
[16]
• Moisten the hose connection and attach the CO2 supply hose.
[17]
• In the aquarium, choose a dark place (prevents algae growth) with good water flow.
• Fix the flipper vertically at least 5 cm below the water level.
[18]
Your CO2 fertilization system is now ready for operation.
5 Setting the CO2 quantity (bubble count)
5.1 The right amount of CO2
For lush plant growth, Dennerle recommends a CO2 content in the aquarium between
20 and 25 mg/l.
CO2 contents above 30 mg/l are not necessary for healthy plant growth and should be avoided in order to prevent unnecessary
stress for fish and other aquarium inhabitants.
The CO2 content can be determined with the CO2 long-term test (see 6) or by measuring carbonate hardness and pH value (see
6.7).
5.2 Setting the bubble count
One measure for the amount of CO2 supplied is the bubble count. The required bubble count depends on various factors, such
as the type of plants, the water flow and the illumination intensity. This is why it is necessary to calculate the amount of CO2
for each aquarium individually.
Rule of thumb for basic setup:
Start with approx. 10 bubbles per minute per 100 l of aquarium water. For example, for a 200 l
aquarium, start with approx. 2 x 10 = 20 bubbles per minute.
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