Biological filter attachment for aquarium hang-on filters
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United States of America Patent
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Mar 16, 2004
Grant Date -
N/A
app pub date -
May 23, 2003
filing date -
May 23, 2003
priority date (Note) -
Expired
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Abstract
A biological filter for an aquarium hang-on filter that attaches to the outflow of the aquarium hang-on filter. The biological filter includes a multiplicity of convoluted plastic channels over which water exiting the aquarium hang-on filter cascades and on the surfaces of which aerobic bacteria can form.
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