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6. Setting the number of bubbles
Rule of thumb for the basic setting*: start with approx. 10 bubbles per
minute per 100 l of aquarium water, i.e. for a 200-l aquarium, for
example, use 2 x 10 = 20 bubbles per minute.
Adjust the CO
supply to the desired CO
content in small steps spread
2
2
over several days. Please note: The more vigorously the surface of the
water is set in motion (e.g. by filters, additional aeration), the more CO
will be expelled from the aquarium again
•
Open cylinder valve slowly by tur-
ning the handwheel in anti-clockwi-
se direction. Unscrew valve as far
as it will go, then screw in again by
one half-turn.
The cylinder pres-
sure manometer will now indicate
approx. 60 bar (at 20 °C).
•
Turn setting screw for operating pres-
sure on the pressure reducer slowly
towards " + " , until the operating
pressure is set to approx. 1 bar.
•
Slowly open the needle valve, initi-
ally only very slightly, until the first
bubbles issue from the opening of
the CO
tube of the Flipper.
2
•
Set the desired number of bubbles
on the needle valve:
- Turn in clockwise direction to redu-
ce thenumber of bubbles
- Turn in anti-clockwise direction to
increase the number of bubbles.
Please note: There is always a certain delay before the number of
bubbles changes in response to adjustment of the needle valve.
The number of bubbles should thus be set with due care.
•
Check the number of bubbles regularly in the first few days, cor-
recting as necessary. After this initial period it is generally suffi-
cient to check the number of bubbles once a week.
•
Refit protective cap on needle valve.
7. CO
long-term test Correct for simple control of CO
2
content
The CO
long-term test Correct enables continuous, exact control of the
2
CO
content in the aquarium.
2
The colouring of the special CO
indicator varies according to the CO
2
content: from • blue = not enough CO
through • green = ideal CO
2
content to • yellow = too much CO
.
2
The level of CO
in the aquarium can be read directly from the colour
2
matching scale in milligrams per litre.
The test shows the correct CO
content at all times by means of the spe-
2
cial CO
indicator developed by DENNERLE. The test remains unaffected
2
by any other acids in the aquarium wat, e.g. humic acids, and any chan-
ges in carbonate hardness resulting from an increase in waterhardness,
evaporation or a change of water!
16
What's what
2
Bottom part of test container
Top part of test container
Mounting bracket
Conical reflector
Longlife suction clip
O-ring
Special CO
indicator
2
Colour matching scale
Clasp
Installation procedure
for the CO
long-term test Correct
2
•
Remove test container from clasp.
Pull off top part of test container.
•
Take an ampoule of special CO
indicator and ensure that there is no
indicator in the neck of the ampou-
le! For this purpose, shake the indi-
cator down to the bottom of the
ampoule (in the same manner as a
thermometer is shaken before
2
taking someone's temperature).
Open ampoule by twisting off the
sealing tab.
•
Drip the entire contents of the
2
ampoule into the top part of the
2
test container.
•
Slot bottom part of housing inclu-
ding conical reflector into the top
part. Check that the O-rings are fit-
ted correctly!
•
Turn test container carefully and ins-
ert in clasp.
•
Use the suction clip to secure the
CO
long-term test in an upright
2
position at a clearly visible point in
the aquarium where a gentle flow
of water prevails.
Stick the colour matching scale to
the outside of the front pane.
Please note. As the CO
to diffuse into the indicator, the colouring
of the indicator always responds to chan-
ges in the CO
several hours. You should therefore
always increase the supply of CO
small steps spread over several days until
the ideal CO
Use as a long-term pH test
The pH value in an aquarium is determined primarily by the carbonate
hardness and the level of CO
, some of which forms carbonic acid when
2
it dissolves in the water. Provided that there are no other substances in
the water which will have a substantial influence on the pH level (e.g.
major quantities of humic acids or nitrate, pH plus / pH minus prepa-
rations etc.), the DENNERLE CO
long term test can also be used to
2
monitor the pH value in the aquarium. For this purpose, you must:
• Measure the carbonate hardness of
19
the aquarium water (tests available
2
from specialist retailers).
• Stick an appropriate colour matching
scale to the outside of the front
pane.
19
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 appro-
priate colour scale.
8. If you're keen to know more: How to calculate the
CO
content in the aquarium
2
As certain correlations apply between CO
2
(CH) and pH value, the CO
content in the water can be calculated as
2
follows:
•
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 pH 6.8 +/- 0.1.
Too much CO
2
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
3
48
38
30
24
4
64
51
40
32
5
80
63
50
40
6
96
76
60
48
7
111 89
70
56
8
127 101 80
64
9
143 114 90
72
10 159 126 100 80
takes some time
11 175 139 111 88
2
12 191 152 121 96
13 207 164 131 104 82
14 223 177 141 112 89
content after a delay of
2
9. Information on the CO
in
2
The CO
Flipper is a modern, highly effective CO
2
res the most efficient possible use of valuable CO
content is attained.
2
at the opening of the CO
the bottom of the Flipper. The CO
rise slowly in the Flipper, in the course of which
the CO
At the same time, other gases which are natural-
ly dissolved in the aquarium water penetrate into
the CO
explain why the bubbles do not dissolve comple-
tely, despite becoming smaller as they rise in the
aquarium water. The waste gases are substantial-
ly lighter than the relatively heavy CO
accumulate in the collector at the top. Here they are discharged regu-
larly and automatically via the specially developed waste gas vent.
The running-in period for the CO
the individual CO
bubbles combine to form larger bubbles. A biological
2
surface layer of microorganisms soon forms in the Flipper, however.
This ensures that the individual CO
to the collector without combining.
Care and maintenance
10. Replacing the CO
•
Close cylinder valve.
•
Let off any residual pressure in the pressure reducer by opening the
needle valve. Then close needle valve. Caution: Tighten only gently!
•
Unscrew pressure reducer from CO
content, carbonate hardness
led reusable CO
cylinder. Reset number of bubbles.
2
NOTE: The refilling of CO
-cylinders is only allowed to be carried out by
2
authorized filling stations.
Special information: The needle valve is intended only for fine adjust-
content
2
ment of the number of bubbles. Always close the cylinder valve in order
to shut down the CO
supply for a prolonged period! Unscrew the pres-
2
sure reducer when the cylinder is to remain out of use for a prolonged
period.
CO
correct
Not enough CO
2
2
pH value
13
10
8
6
5
4
3
3
2
19
15
12 10
8
6
5
4
3
25
20
16 13
10
7
6
5
4
32
25
20 16
13
10
8
6
5
38
30
24 19
15
12
10
8
6
44
35
28 22
18
14
11
9
7
51
40
32 25
20
16
13
10
8
57
45
36 29
23
18
14
11
9
63
50
40 32
25
20
16
13
10
70
55
44 35
28
22
18
14
11
76
60
48 38
30
24
19
15
12
65
52 41
33
26
21
16
13
70
56 44
35
28
22
18
14
Flipper
2
diffusor which ensu-
2
. The CO
is released
2
2
hose which is located at
2
bubbles then
2
dissolves in the aquarium water.
2
bubbles. These so-called waste gases
2
and thus
2
Flipper is approx. 2 days. Initially,
2
bubbles pass through the Flipper up
2
cylinder
2
cylinder and screw onto refil-
2
17
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