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The Biostar is a complete biological and mechanical filter system for
aquariums up to 250 l (c. 65 gal) volume and is easily mounted as a
hang on filter (4 cm, c. 1.6" capacity) outside the aquarium. Its
principal component is the Biorotor, a rotating sponge wheel. This
wheel is only partly immersed and as a result, the bacteria living on
the sponge are alternately emersed and submersed. This encourages a
high oxygen uptake and the filter becomes a powerful reducer of
biological waste - volume to volume far more efficient than
conventional trickle filters. The Biostar is equipped with a pre
filter sponge for mechanical filtration and a circulation pump with a
capacity of 1000 l/h (c. 250 gph).
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