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shut off).
•
Check whether the washer in adapter and the sealing surface of
the cylinder valve are clean.
•
Screw pressure reducer slowly into place without canting, until a
slight resistance becomes noticeable: This indicates that the pin in
the adapter has established contact with the cylinder valve. Then
swiftly turn the pressure reducer by roughly a further half-turn
and tighten finger-tight. A brief hiss may occur at this point.
•
The pressure reducer can be unscrewed again at any time – the
cylinder valve closes automatically. A brief hissing sound may
also occur when unscrewing the pressure reducer – it is thus ad-
visable to unscrew the pressure reducer swiftly at the beginning.
3.1.3
Connection to Dennerle CO
(connection thread 5/8-18 UNF)
•
Turn setting knob as far as it will go in direction "-" (CO2 supply
shut off).
•
Check that the washer in the connection socket of the pressure re-
ducer, the sealing surface of the disposable CO2 cartridge and
all threads are clean and free of any damage.
•
Hold the pressure reducer and screw the cartridge in without can-
ting until a slight resistance is noticeable – this is caused by the
pin in the connection socket of the pressure reducer, which opens
the cartridge – quickly continue turning the cartridge until it is
finger-tight.
IMPORTANT: The pressure reducer may only be unscrewed
from the cartridge again when the cartridge is empty – ot-
herwise, there is a danger of injury resulting from the un-
controlled escape of CO2!
3.2 Fitting the check valve in the CO2 hose
•
Cut a piece of approx. 10 cm in length from the CO2 hose, en-
suring that the cut is straight.
•
Unscrew both coupling rings from the CO2 check valve.
•
Slide hoses as far as they will go onto the hose connectors and fix
with coupling rings.
Important: The arrow on the check valve must point in the CO2
flow direction, i.e. in the direction of the long hose section!
3.3 Connecting the CO2 hose to the pressure reducer
•
Unscrew coupling ring from the hose connector of the pressure
reducer, slide on CO2 hose and secure with coupling ring. µ
3.4 Connect to the power supply
The integrated solenoid valve enables the supply of CO2 to be controlled:
1
With a time switch
This serves to cut off the CO2 supply at night, as plants do not consume
any CO2 during the night. Tip: Connect the pressure reducer to the
disposable cartridge
2
time switch which is also used to control your aquarium lighting. ¸
2
Or with a pH controller
A pH controller such as the Dennerle pH controller Evolution measures
the pH value in the aquarium continuously and controls the supply of CO2
precisely and fully automatically via the Space pressure reducer. ¹
Control states:
Power ON = LED ON = solenoid valve open.
Power OFF = LED OFF = solenoid valve closed.
Your CO
pressure reducer is now ready for use.
2
Now install the other components of your CO2 fertilizer system, such
as the CO2 bubble counter, CO2 diffusor, etc. Please observe the in-
structions for use of the devices concerned.
4 Setting the amount of CO
4.1 The right amount of CO
For lush plant growth, Dennerle recommends a CO
aquarium of approx. 20 to 25 mg/l.
Levels of CO2 above 30 mg/l are not necessary for healthy plant growth
and should be avoided, so as to ensure that the fish and other creatures
living in the aquarium are not subjected to any unnecessary stress.
4.2 Determining the CO
Certain correlations apply between CO2 content, carbonate hardness
(KH) and pH value. The CO2 content in the water can be calculated
accurately on the basis of the pH value and carbonate hardness.
Suitable pH and KH tests are available from specialist retailers.
•
Measure the carbonate hardness of your aquarium water.
•
Read the pH value which corresponds to the desired CO2 content
from the table. You should set this pH value +/- 0.1 by
adjusting the number of bubbles accordingly.
Example: Carbonate hardness 4 °d, recommended pH 6.8 +/- 0.1.
Professional tip from Dennerle
trop de CO
2
KH 6,3 6,4 6,5 6,6 6,7 6,8 6,9 7,0 7,1 7,2 7,3 7,4 7,5
2
32
25
20
16
13
3
48
38
30
24
19
4
64
51
40
32
25
5
80
63
50
40
32
6
96
76
60
48
38
7
111 89
70
56
44
8
127 101 80
64
51
9
143 114 90
72
57
10 159 126 100 80
63
11 175 139 111 88
70
12 191 152 121 96
76
13 207 164 131 104 82
14 223 177 141 112 89
CO
(number of bubbles)
2
2
level in the
2
content in the aquarium
2
CO
bon
pas assez de CO
2
pH
10
8
6
5
4
3
15
12 10
8
6
5
20
16 13
10
7
6
25
20 16
13
10
8
30
24 19
15
12
10
35
28 22
18
14
11
40
32 25
20
16
13
45
36 29
23
18
14
50
40 32
25
20
16
55
44 35
28
22
18
60
48 38
30
24
19
65
52 41
33
26
21
70
56 44
35
28
22
-content in mg/l
2
2
3
2
4
3
5
4
6
5
8
6
9
7
10
8
11
9
13
10
14
11
15
12
16
13
18
14
12
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