JBL PRO FLORA TAIFUN SPIRAL 10, Manual, Page: 9 / 56

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bio-film have formed, allowing the bubbles to rise freely
upwards. As they rise, the bubbles will become smaller as
a sign of the diffusion of the CO
2
into the surrounding water.
Once the bubbles are at the top, they reach the collection
cap where any remaining CO
2
can diffuse completely.
Note:
After some time the collection cap fills with gas which will
now and again escape upwards through the ventilation
openings. This gas is not CO
2
, but so-called “false” gas which
is sometimes present in small quantities in CO
2
cylinders or
which diffuses into the bubbles on their way upwards from
the surrounding water. Please clean the reactor as little as
possible. It is best fitted in a dark part of the aquarium where
the current is sufficient.
The number of bubbles:
With bio-CO
2
systems, the number of bubbles is predetermi-
ned by the system and can’t be regulated. For systems with
pressurised gas cylinders:
the amount of CO
2
needed depends on the quantity of
water, the carbonate hardness, the pH level required and
its consumption by plants. Start initially with one bubble in
every second bend in the device and slowly increase the
number over the course of several days, as required. The pH
value serves as a control. For monitoring we recommend the
JBL PRO AQUATEST CO
2
-pH Permanent .
UK