© by WilTec Wildanger Technik GmbH
Item 50948
–50953
Page 7
09 2021
-1
Filter media
(see Fig. 3)
Ceramic rings
Filter foam
Filter floss
Bio balls
The included filter media form the basic kit for your external aquarium filter.
Starting with the lowest filtration layer, the order is:
1
st
layer:
mechanical/partial biological filtration
2
nd
layer:
biological filtration
3
rd
layer:
chemical filtration (activated carbon, peat, phosphate etc.)
If you purchase a 4-stage filter, you can add a mechanical or biological filter layer as required.
Ceramic rings
Ceramic rings can be used for internal and external aquarium filters. Mechanical filter media are used
to remove suspended particles. The ceramic rings cause water swirls inside the filter basket due to their
special form and large surface. The suspended particles accumulate when sinking to the bottom and
are thus removed from the water circulation. In addition, the ceramic rings provide optimal conditions for
nitrifying bacteria which reduce nitrite peaks better than conventional filter media.
Filter floss
Filter media like floss or sponges are essential material for every modern aquarium. Filter floss absorbs
large dirt particles, sponges reduce nitrate, absorb chemical impurities and provide optimal conditions
for nitrifying bacteria.
Bio balls
Bio balls are used as mechanical and biological filter media. They provide optimal conditions for nitrifying
bacteria due to their extra-large surfaces and are considered high performance filter media, especially
for large filter systems. In contrast to other filter media, bio balls have a practically unlimited life span,
which makes them a popular and low-cost filter medium for pond filters, trickle filters and chamber filters.
Activated carbon (optional)
Activated carbon is used to absorb urea, humic substances, pesticides, metabolic products, and similar
residues, thus ensuring clean aquarium water. Activated carbon also reduces the concentration of ozone
and chlorine in the water. Activated carbon is particularly suitable for pre-treatment of tap water, for
turbid water due to suspended particles and for absorbing residues of medication.
During medication or algae control, the use of activated carbon should be avoided. After the treatment,
however, activated carbon is indispensable to remove any residues. We do not recommend leaving
activated carbon in the filter over a long period of time. Once the carbon’s capacity has been reached,
there is a possibility that the absorbed harmful substances are washed out and get back into in the
aquarium water.
When purchasing a new aquarium filter or after a complete cleaning, the nitrifying bacteria population
must be accumulated (once again). There are special bacteria cultures that can be added to the aquar-
ium filter, thus facilitating the accumulation.
