21
UK
whilst at the same time providing plants with their main source of nutrients. Thus luxuriant plant
growth and lively, healthy sh are guaranteed.
How much CO
2
is needed to maintain a particular pH value depends on the KH in the aquarium.
The higher the KH, the more CO
2
is required. Once the KH and pH values are known, the CO
2
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 sh.
CO
2
content depending on pH value and KH
Too much CO
2
auto pH curve
CO
2
correct
Too little CO
2
The auto pH curve shows the levels for the m503 and m2003 CO
2
kits which the pH computer
automatically maintains when the “auto pH“ option is activated. For your sh’s’ safety, we
recommend having this option activated.
12.2 The correct amount of CO
2
and the correct pH value
JBL recommends a CO
2
content of between 15 and 30 mg/l in aquarium water. This range is
marked with “CO
2
correct “ in the table above. 20 – 25 mg/l have proved to be ideal. This level is
not harmful to sh 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
2
correct“, look for the pH value which is correct for the KH and the
desired CO
2
value.
• Gradually adjust the CO
2
bubble count so that this pH level is attained.
Please ensure that only those pH values are set which do not harm sh. This is the section of
the table labelled “CO
2
correct“.
12.3 Setting the amount of CO
2
The amount of CO
2
which must be added for the desired pH value depends on various factors
such as water movement, consumption by plants, etc. and must be calculated individually for
each particular aquarium.
CO
2
(mg/l)
KH
pH
2 4 6 8 10 12 14 16 18 20
7,8 1 2 3 4 5 6 7 9 9 10
7,6 2 3 5 6 8 9 11 12 14 15
7,4 2 5 7 10 12 14 17 19 21 24
7,3 3 6 9 12 15 18 21 24 27 30
7,2 4 8 11 15 19 23 27 30 34 38
7,1 5 10 14 19 24 29 33 38 43 48
7 6 12 18 24 30 36 42 48 54 60
6,9 8 15 23 30 38 45 53 60 68 76
6,8 10 19 29 38 48 57 67 76 86 95
6,7 12 24 36 48 60 72 84 96 108 120
6,6 15 30 45 60 75 90 105 121 136 151
6,4 24 48 72 96 119 143 167 191 215 239
6,2 38 76 114 151 189 227 265 303 341 379
To Next Page
Loading...
