Sera PRECISION 08056 Manual Del Usuario página 13

it is easy to see and is well circulated by water [e.g. on the side pane
of the aquarium, using the suction cups (1.9)].
Operation
First adjust the pressure at the pressure reducer (1.7) to approx.
1.5 bars (21.75 psi.). Then open the fine needle valve to about 60 bub-
bles/min. The number of bubbles is easily visible in the cone shaped
lower part (3.1) of the pressure diffuser. The bubbles cleanly escape
from the tip near the bottom and rise towards the ceramic disc (3.2)
which finely disperses the bubbles as they are pressed through.
The CO amount your aquarium needs depends on the growth of
2
the plants, which is also influenced by other factors such as light
quality and light amount. We generally recommend applying an
amount of 60 – 100 bubbles/min. for a well-planted aquarium con-
taining 200 – 300 liters (53 – 79 US gal.).
Monitor the CO concentration with the sera CO long-term indica-
2 2
tor and adjust the CO supply towards higher or smaller amounts ac-
2
cording to the result. The energy binding photosynthesis process –
and, correspondingly, the CO fixation – stops as soon as the lights
2
are turned off in the evening. Continuous CO addition during dark-
2
ness would only cause pH lowering as it reacts with water to form
carbonic acid. This will affect fish breath. The CO supply can be easily
2
interrupted by a sera CO solenoid valve and a simple electric timer
2
(fig. 4).
13