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4 Controlling CO
2
long-term test
4.1 Mode of functioning
The colouring of the special CO
content:
•
Blue = not enough CO
2
•
Green = CO
level ideal (approx. 20 mg/l)
2
•
Yellow = too much CO
2
The CO
content in the aquarium can be read directly from the colour
2
matching scale in mg/l.
4.2 Installation procedure for the CO
•
Remove test container from clasp. Pull off top part of test con-
tainer.
•
Shake the indicator down in the ampoule so that there is no in-
dicator in the neck of the ampoule. Twist off sealing tab.
•
Fill the top part of the test container with the entire contents of
the ampoule.
•
Slot bottom part of housing including conical reflector into the
top part. Check that the O-rings are fitted correctly.
•
Turn test container carefully and insert in clasp.
•
Secure the CO
long-term test in an upright position at a clearly
2
visible point in the aquarium where a gentle flow of water pre-
vails.
•
Stick the "CO
" colour matching scale to the outside of the front
2
pane.
Please note: As the CO
takes some time to diffuse into the indicator,
2
the colouring of the indicator always takes 1-2 hours to respond to
changes in the CO
content. You should therefore always increase the
2
supply of CO
only in small steps of a few bubbles per minute spread
2
over several days until the ideal CO
4.3 Use as a long-term pH test
Provided that there are no other substances in the water which will
have a substantial influence on the pH level (e.g. humic acids, nitrate,
pH minus preparations), the CO
nitor the pH value in the aquarium.
For this purpose, you must:
•
Measure the carbonate hardness (CH) of the aquarium water
(tests available from specialist retailers).
•
Stick the appropriate "pH" colour matching scale to the outside
of the front pane. ©
21
The pH value of the aquarium water can now be read directly from the
colour scale. Measure the carbonate hardness regularly and always
use an appropriate colour scale.
4.4 Replacing the special CO
In order to guarantee the quickest and most exact colour response at
content with the CO
indicator varies according to the CO
2
long-term test Correct
2
content is attained.
2
long term test can also be used to mo-
2
indicator
2
all times, we recommend filling the test container with fresh special CO
2
indicator every 4 to 6 weeks.
For this purpose, open the test container and pour the old indicator
down the drain. Rinse test container with tap water and dry with kit-
2
chen paper before refilling.
4.5 Cleaning the CO
Use warm water and a soft sponge. Do not use any cleaning agents.
If necessary, grease the two O-rings slightly with Vaseline before re-
assembling the test container. Do not use any other lubricants, as these
may lead to incorrect colour indications.
4.6 Special information
•
The special CO
chemical solvents. Prolonged skin contact and eye contact should
nevertheless be avoided.
•
Any indicator which may be dropped into the aquarium water by
mistake is harmless for the creatures living in the aquarium.
•
The indicator should be protected from sunlight, heat and frost.
Always keep ampoules protected from light during storage. The
filling level may vary for technical reasons.
4.7 If you're keen to know more: How you can also
calculate the CO
Certain correlations apply between CO
(KH) and pH value. The CO
curately 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 CO
from the table. You should set this pH value +/- 0.1 by
adjusting the number of bubbles accordingly.
Example: Carbonate hardness 4 °d, recommended CO
20 mg/l = recommended pH 6.8
Too much CO
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
3
48
4
64
5
80
6
96
7
111 89
8
127 101 80
9
143 114 90
10 159 126 100 80
11 175 139 111 88
12 191 152 121 96
13 207 164 131 104 82
14 223 177 141 112 89
long-term test container
2
indicator is harmless and does not contain any
2
content in the aquarium
2
2
content in the water can be calculated ac-
2
CO
correct
2
2
pH
25
20
16
13
10
8
38
30
24
19
15
12 10
51
40
32
25
20
16 13
63
50
40
32
25
20 16
76
60
48
38
30
24 19
70
56
44
35
28 22
64
51
40
32 25
72
57
45
36 29
63
50
40 32
70
55
44 35
76
60
48 38
65
52 41
70
56 44
CO
-content in mg/l
2
2
content, carbonate hardness
content
2
content
2
Not enough CO
2
6
5
4
3
3
2
8
6
5
4
3
10
7
6
5
4
13
10
8
6
5
15
12
10
8
6
18
14
11
9
7
20
16
13
10
8
23
18
14
11
9
25
20
16
13
10
28
22
18
14
11
30
24
19
15
12
33
26
21
16
13
35
28
22
18
14
14
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