Aqua Medic EVO 500 Mode D'emploi page 10

Spare parts list DC Runner Controller
Art.-No. Pict.-No.
100.300 Fig. 3
3. Theory
Protein skimming is a method of physical water treatment. It uses a phenomenon known from our
daily experience: the adhesion of surface active substances to air water layers. If we add a drop of
oil to a water surface, a thin film is produced with a thickness of only one molecule. Surface active
compounds like proteins behave in the same way. The skimmer EVO 500 uses its air bubbles to
create a large water surface for the waste substances to attach themselves to. These air bubbles
are forced 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 draws water out of the aquarium or filter chamber, mixes it with air in the pump
housing which is then cut into small air bubbles by the Aqua Medic 3D needle wheel (Fig. 2, No. 5).
This water/air mixture is then pumped into the reaction pipe where 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 discharge (Fig. 1, No.
7).
4. Set-up
The EVO 500 is a skimmer that can be set up in various ways:
1. As an internal skimmer, directly mounted on a glass bar or aquarium pane.
2. Hung on the overflow edge of a filter chamber.
Set-up as an internal skimmer in the aquarium:
First of all, the skimmer has to be put together according to Fig. 1. It can easily be mounted at the
aquarium pane or a glass support by using the holding unit. The best place for mounting is either
at the side or back – well accessible but protected. The pump is put into the connecting piece (6) of
the skimmer, the cable points downwards and the air hose upwards to connect to the silencer (14).
The sound absorber can be attached to the foam cup (2) or an aquarium pane by using the holding
unit (15). To do so, take off the protective plastic film from the tape. The adhesive surface must be
clean and free of grease.
Fig. 4: Holding unit EVO 500
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DC Runner Controller