EN
Malfunction Possible cause Remedy
Air trapped in the filter. Insufficient distance between the filter and
the water level in the aquarium.
Position the top edge of the filter head at least
10 cm below the level of the water.
Filter media clogged. Clean the filter media.
Air entering through the intake pipe.
Route a hose between the intake pipe and fil-
ter below the level of the water in the aquar-
ium.
Renew the O-ring on the intake pipe.
The filter does not start
up correctly.
Filter media insufficiently cleaned. Clean the filter media.
The filter media is contained in nets. Do not use filter media in nets or nylons as the
filter will become clogged.
Unusual noises emitted
when the filter starts
up.
Air is entering through the hose connec-
tion.
Connect the hoses properly.
Air trapped in the filter. Carefully shake the filter to allow the air to es-
cape.
Unusual noises emitted
from the filter during
operation
Foam pre-filter clogged. Clean the foam pre-filter.
Insufficient flow rate Open the stop valves to increase the flow rate.
Insufficient lubrication of the O-rings. Apply a generous amount of commercially
available lubricant such as Vaseline to the O-
rings.
Uneven water circulation due to insuffi-
cient intake of water.
Disconnect and reconnect the power plug to
start up the filter again.
Insufficient distance between the filter and
the water level in the aquarium.
Position the top edge of the filter head at least
10 cm below the level of the water.
Air trapped in the filter. Carefully shake the filter to allow the air to es-
cape.
There is a sound of air being emitted from
the outlet pipe about every 10 seconds.
Air released by aquatic plants during photosyn-
thesis and by bacteria causes the formation of
air bubbles, which cause this sound. No mea-
sures necessary.
The start button is pressed. Never press the start button when the filter is
operating.
Ensure that no objects accidentally press
against the start button.
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