Basics – Filter Media - WilTec SUNSUN HW-302 Operation Manual

Basics – Filter media
The delivered filter media represents only the basic filter material needed for your aquarium.
Please inform yourself regarding what filter materials are suitable for your aquarium because these
can differ depending on the fish and plants living there.
Please use one filter cotton for only one filter stage. This should be regularly renewed because dirty fil -
ter cotton can quickly lead to a decrease in filter efficiency.
Aquarium external filters consist of several layers. The water sucked in is filtered in several stages.
The lowest layer consists of bio balls. These balls offer bacteria a large settling area and retain coarse
dirt. Above that, a layer of ceramic rings should follow. On the top level, we recommend a filter sponge
covered with a filter cotton. (This is an example; please adapt it to your pratical aquarium.)
Additionally and temporarily, you can place here another layer of activated carbon (in a net or partly
available as filter mat), and this will one of the filter layers. This should not be permanent, but only be
used after a medication treatment and for turbid water with suspended particles. (Not included.)
When you purchase a new aquarium filter or after it has been fully cleaned, the useful bacteria must
be enriched again. For this reason there are special bacteria cultures that can be supplied in the
aquarium to facilitate their settlement.
Basically, put the filters from bottom to top as follows:
1 st stage: mechanical/semibiological filtering
2 nd stage: biological filtering
rd
3 stage: chemical filtering (activated carbon, peat, phosphate, etc.)
If necessary, the aquarium filter can be extended to 4 stages by adding a mechanical or biological filter
stage.
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