Aqua Medic EVO 500 Mode D'emploi page 11

By using the mounting profile (11), the retaining plate (7) can be fastened to a bar or vertical
pane. Further down, a second profile (12) can be mounted as a spacer. The distance can be
adjusted by using the screws (12a) so that the retaining plate hangs down vertically. On the
opposite side of the mounting profile, the connecting piece (9) for the adjustment screw and
holding plate are mounted. To do so, the adjustment screw (8) has to be put through the hole (9a)
of the screw holder, then it has to be screwed in the thread (10) of the holding unit. This can be
moved up and down by turning the screw (8). The skimmer is hung up by putting the laterally
mounted holding bracket into the slot (10b) of the holding unit. In order that the skimmer hangs
straight, a second holding unit with rubber feet (no picture) will be fixed as a spacer at the bottom
of the retaining plate. The skimmer is adjusted in such a way that the discharge is above water
level.
Set-up in a filter chamber:
The EVO 500 can also be mounted at a glass pane of a filter chamber. The skimmer's discharge
(Fig. 1, No. 7) is extended downwards to give a safe support. The skimmer needs at least 23 - 24
cm immersion depth (to the bottom of the discharge (Fig. 1, No. 7).
5. Starting/Operation
The system can be started when it is correctly installed. After switching on the pump, air is
automatically drawn into the skimmer. To minimize the noise level, connect the air inlet tube with
the blue connecting piece of the silencer supplied. Fix the silencer with the holding unit on the
aquarium or filter system above water level.
The needle wheel breaks the air into small bubbles. This method eliminates the greater proportion
of noise. After the initial start, it might take a few days until the foam production is ideal. This is
due to a reaction between the surface of acrylic glass and aquarium water. Equilibrium of electrical
charges takes place. The quantity of liquid and organic substances is dependent on the pollution of
the aquarium. Using the DC Runner Controller, the foam production can be optimized. It is
normal that you need to adjust a few times in the first period.
In the discharge of the skimmer, there is a sponge that needs to be cleaned regularly.
6. Problems
Adjustment
The skimmer is adjusted by using the water level controller so that it works to its optimum. The
water level in the skimmer has to be adapted for foam production. If the foam is too wet, the water
level controller (Fig. 1, No. 4) has to be further opened and thus the water level lowered. If the
foam is too dry, the process has to be done vice versa. Furthermore, there is the possibility to
control the foam production electronically by the DC Runner Controller.
Air bubbles in the outflow
If the skimmer is added to an existing aquarium, there might be a high concentration of organic
substances already dissolved in the water. This results in very tiny bubbles in the skimmer. These
tiny bubbles remove organic substances effectively, however, it may happen that some of these
bubbles are drawn back into the aquarium. After a few days, the concentration of organic
substances will have decreased to such low levels that this effect will have gone and the water flow
is free of air bubbles.
Very rarely, there's a reasonable adjustment in new established aquaria. Either the skimmer „cooks
over" or „bubbles" without foaming power. This is normal and will be settled by itself as soon as
living animals will be in the tank.
Some types of frozen food may have the same effects. It is best to thaw and wash the food prior to
feeding it to the fish. The air bubbles will stop after a short period by themselves. Greases will stop
the skimming completely.
If the air nozzle or air hose is blocked with salt or lime deposits, less air and more waters is sucked
in. In this case, clean both completely.
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