Dennerle CarboNIGHT M400 Gebrauchsanleitung Seite 26

6.7 If you want to know more: How to determine the CO2 content in the aquarium
CO2 concentration, carbonate hardness (KH) and pH are in a certain ratio to one another. The CO2 concentration of the water
can be calculated from the pH and carbonate hardness. Suitable pH and KH tests can be obtained from specialist retailers.
• Measure the carbonate hardness of the aquarium water.
• In the table, read the corresponding pH value for the desired CO2 concentration. You should adjust the pH +/- 0.1 by
appropriately regulating the bubble count.
Example: Carbonate hardness 4 °d, desired CO2 content 20 mg/l = recommended pH 6.8
too much CO2
KH 6,3 6,4
2
32 25
3
48 38
4 64 51
5
80 63
6
96 76
7
111 89
8
127 101
9 143 114
10 159 126
11
175 139
12
191 152
13
207 164
14
223 177
7 Care and maintenance
7.1 Replacing disposable CO2 bottle
• The pressure reducer can be unscrewed at any time – the bottle valve closes automatically.
• Screw the pressure reducer onto a new CO2 disposable bottle (see 4.1).
The bubble count setting is retained.
• If it is not to be used for a longer period of time, unscrew the pressure reducer.
7.2 Replacing reusable CO2 bottle
• For an empty bottle: Close bottle valve. Unscrew union nut with 27 mm spanner and screw pressure reducer onto a new,
full reusable CO2 bottle. Open bottle valve. The bubble count setting is retained.
• For a full bottle: Close bottle valve. Turn the control knob of the pressure reducer all the way to „+" to release any
residual pressure in the pressure reducer (the magnet valve must be open). Unscrew the union nut with a 27 mm spanner
and screw the pressure reducer onto a new, full reusable CO2 bottle. Open bottle valve. Reset bubble count.
• Always close the bottle valve if the CO2 supply is stopped for a longer period of time. If it is not to be used for a longer
period of time, unscrew the pressure reducer.
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CO2 correct
6,5 6,6 6,7 6,8
20 16 13 10
30 24 19 15
40 32 25 20
50 40 32 25
60 48 38 30
70 56 44 35
80 64 51 40
90 72 57 45
100 80 63 50
111 88 70 55
121 96 76 60
131 104 82 65
141 112 89 70
CO2 concentration in mg/l
too little CO2
pH
6,9 7,0 7,1
8 6 5
12 10 8
16 13 10
20 16 13
24 19 15
28 22 18
32 25 20
36 29 23
40 32 25
44 35 28
48 38 30
52 41 33
56 44 35
7,2 7,3 7,4 7,5
4 3 3 2
6 5 4 3
7 6 5 4
10 8 6 5
12 10 8 6
14 11 9 7
16 13 10 8
18 14 11 9
20 16 13 10
22 18 14 11
24 19 15 12
26 21 16 13
28 22 18 14