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12 How much CO
12.1 pH level, CO
The three parameters, pH value, CO
as they are interdependent.
When CO
comes into contact with water, a certain amount of carbon dioxide is produced which
2
reduces the pH value. The greater proportion remains dissolved in the water in the form of gas
and serves as an important nutrient for plants. Therefore, CO
level of pH in the aquarium, which is usually too high, to a level appropriate for fish and plants
whilst at the same time providing plants with their main source of nutrients. Thus luxuriant plant
growth and lively, healthy fish are guaranteed.
How much CO
is needed to maintain a particular pH value depends on the KH in the aquarium.
2
The higher the KH, the more CO
content can be calculated. The following table saves you making the calculations and also
shows the pH values which you can set as an optimum value without any risk to your fish.
CO
content depending on pH value and KH
2
CO
(mg/l)
2
KH
pH
2
7,8
1
7,6
2
7,4
2
7,3
3
7,2
4
7,1
5
7
6
6,9
8
6,8
10
6,7
12
6,6
15
6,4
24
6,2
38
Too much CO
CO
correct
2
Too little CO
The auto pH curve shows the levels for the m503 and m2003 CO
automatically maintains when the "auto pH" option is activated. For your fish's' safety, we recom-
mend having this option activated.
12.2 The correct amount of CO
JBL recommends a CO
correct " in the table above. 20 – 25 mg/l have proved to be ideal. This level is
marked with "CO
2
not harmful to fish whilst at the same time promoting luxuriant plant growth.
•
Measure the KH of your aquarium water with the enclosed JBL KH test kit.
•
In the section "CO
sired CO
value.
2
•
Gradually adjust the CO
is needed?
2
and carbonate hardness (KH)
2
content and carbonate hardness, are inseparably linked,
2
is required. Once the KH and pH values are known, the CO
2
4
6
8
2
3
4
3
5
6
5
7
10
6
9
12
8
11
15
10
14
19
12
18
24
15
23
30
19
29
38
24
36
48
30
45
60
48
72
96
76
114
151
auto pH curve
2
2
content of between 15 and 30 mg/l in aquarium water. This range is
2
correct", look for the pH value which is correct for the KH and the de-
2
bubble count so that this pH level is attained.
2
10
12
5
6
8
9
12
14
15
18
19
23
24
29
30
36
38
45
48
57
60
72
75
90
119
143
189
227
and the correct pH value
2
has two benefits: it reduces the
2
14
16
7
9
11
12
17
19
21
24
27
30
33
38
42
48
53
60
67
76
84
96
105
121
167
191
265
303
kits which the pH computer
2
UK
2
18
20
9
10
14
15
21
24
27
30
34
38
43
48
54
60
68
76
86
95
108
120
136
151
215
239
341
379
21
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