11
Note:
If the control knob is turned in larger steps of approx. 1 turn towards "-", the pressure reducer releases the ex
-
cess 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 CO
2
content in the aquarium
CO
2 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 CO
2
CO
2
correct
too little CO
2
pH
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
10
8
6
5
4
3
3
2
3
48
38
30
24
19
15
12
10
8
6
5
4
3
4
64
51
40
32
25
20
16
13
10
7
6
5
4
5
80
63
50
40
32
25
20
16
13
10
8
6
5
6
96
76
60
48
38
30
24
19
15
12
10
8
6
7
111
89
70
56
44
35
28
22
18
14
11
9
7
8
127
101
80
64
51
40
32
25
20
16
13
10
8
9
143
114
90
72
57
45
36
29
23
18
14
11
9
10
159
126
100
80
63
50
40
32
25
20
16
13
10
11
175
139
111
88
70
55
44
35
28
22
18
14
11
12
191
152
121
96
76
60
48
38
30
24
19
15
12
13
207
164
131
104
82
65
52
41
33
26
21
16
13
14
223
177
141
112
89
70
56
44
35
28
22
18
14
CO
2
concentration in mg/l
7 Care and maintenance
7.1 Replacing the reusable CO
2
Soda bottle
•
The pressure reducer can be unscrewed at any time – the bottle valve closes automatically.
• Screw the pressure reducer onto the new reusable CO
2
Soda bottle.
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 Checking the CO
2
check valve
The check valve protects your valuable pressure reducer against corrosion by returning water. As dirt particles can settle
on the sealing surfaces over time, the check valve should be checked at least once a year
and
should be replaced every
2 – 3 years.
Tip:
Temporarily install a transparent test hose between the check valve and the pressure reducer and switch off the CO2
Summary of Contents for Carbo Soda M200
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