into the reactor-pipe in a such a way that they undergo a long contact time within the counter-
current. Enriched with organic substances, they rise to the top and form a firm foam that is
dehydrated and pushed into the collection cup. This method removes organic wastes from
aquarium water before they become part of the biological waste treatment cycle.
The venturi pump DC Runner 1.2 of the EVO 1000 draws water out of the filter chamber directly,
mixes it in the pump housing with air which is then cut into small air bubbles by the Aqua Medic 3D
needle wheel. This water/air mixture is then pumped into the reaction pipe where the organic
substances are taken up by air bubbles. Foam is formed and pushed into the foam cup. The
purified water leaves the skimmer via outlet and is directed back to the aquarium or filter sump by
the elbow (Fig. 4, No. 8).
5.
Starting / Operation
The system can be started when the skimmer 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 clip on the
aquarium or the filter system above the 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.
6.
Problems
Adjustment
The skimmer is adjusted using the flow control (Fig. 4, No. 4) as well as the electronic control DC
Runner Controller 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. 4, No. 6) 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 water and less air 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 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.
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. If it is not getting any better, first of all lower the water level in
the skimmer by opening the control flow. Furthermore, reduce the length of the hose (see air
bubbles), use neck extension.
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