Aqua Medic EVO 3000 Manual De Instrucciones página 11

Set up as an external skimmer on the aquarium (Fig. 4):
Assemble the necessary parts of the skimmer (see Fig. 1). Now, it can be attached to the aquarium.
Look for a protected place within easy reach - at the side or the back. The venturi pump is connected
with the pressure hose (17). The length of the flexible tubing should be as short as possible. The
pump must be placed directly below the surface because the air intake will decrease if it is mounted
deeper. An 8-mm air tube is connected to the air injector and fixed above the water level so the
pump can draw in air. Use the full length of the air hose which is attached to the sound absorber
(22).
Now, the skimmer can be aligned with the aquarium. The two screws at the bottom of the skimmer
are adjusted in such a way that the skimmer is hanging safely on the aquarium. It is advantageous if
the skimmer is not 100% upright but leaning slightly (2º) to the aquarium (Fig. 4). The skimmer is
then not only hanging more safely, but also back-flow of water from the outflow box over the
aquarium frame is prevented. Both adjusting screws at the bottom are supplied with silicone suction
cups for increased safety. The skimmer is now ready for use and can be started.
5. Starting/Performance
The system can be started when the skimmer is correctly installed. After switching the pump on, air
is automatically drawn into the skimmer. To minimize the noise level, connect the air inlet tube with
the blue connecting piece of the sound absorber supplied. Fix the sound absorber with the holding
plate on the aquarium or filter system above the water level.
The needle wheel breaks the air into small bubbles. This method eliminates the greater proportion of
the noise. After the initial start, some hours may pass before the first foam is pushed into the
collection cup. This is due to a reaction between the surface of the acrylic glass and aquarium water.
Equilibrium of electrical charges takes place. After a maximum of 24 hours, the foam should be
pushed evenly into the collection cup. The quantity of liquid and organic substances is dependent on
the pollution of the aquarium.
6. Problems
Adjustment
The skimmer is adjusted using the flow control (Fig. 1, No. 5) as well as the electronic control DC
Runner Control so it works to the optimum. The water level in the skimmer is adapted to foam
production. If the foam is too wet even when the flow control tap is fully open, the neck extension
(Fig. 1, No. 9, not included) can be mounted to adjust the foam production.
Air bubbles
Reduce the length of the hose between pump and skimmer. The pump should be placed close to the
surface otherwise more air and less water will be sucked in because of the increasing water
pressure. Result: Many air bubbles are leaving the skimmer, wet foam will fill the foam cup in a very
short time.
If the skimmer is added to an existing aquarium, there may 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 the organic substances effectively, however, it may be 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.
Some types of frozen food may have the same effects, especially, it the food is not thawn and
washed prior to feeding it to the fish. The air bubbles will stop after a short period by themselves.
Greases will stop the skimming completely.
Wet foam
With freshly prepared salt water, after using water conditioners or at extremely high loading,
excessive wet foam may be produced. This wet foam is forced into the cup, requiring more frequent
emptying than normal. After approx. one day, the aquarium load will be normal and the skimmer will
produce correct foam.
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