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Filter Wool (white pad)
The white filter wool acts as a mechanical pre-filter, removing large particles of dirt
and excess food which in turn ensures that the other sponges do not get clogged.
Active Carbon Sponge (black)
The black activated carbon sponge sits on top of the blue coarse filter sponges, and
removes chemical impurities from the water which cannot be removed biologically.
Nitrate Removal Sponge (green)
The Sponge contains micro-organisms, which will, once developed, reside inside the
sponges and in the water. These micro-organisms feed of nitrates and will reduce them
significantly. The JUWEL Filtration system provides the optimum housing for these
micro-organisms.
Filter Sponge Coarse (blue)
The coarse blue filter sponges allow bacteria cultures to develop quickly, cleaning the
water which is now free from chemical impurities.
Filter Sponge Fine (blue)
The fine blue sponges and the bacteria cultures living in them, clean the water of even
the smallest impurities.
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