| 摘要 |
<p>The invention relates to a filter arrangement for aquariums, biotopes, swimming pools or similar and for sewage pre-treatment, which comprises distinct aerobic and anaerobic regions, separated from each other in filter chambers. Within the filter material, regions of varying flow resistance are provided for the formation of said regions. Aerobic and anaerobic regions, thus, form in the filter material, due to the resulting differing oxygen supplies, which guarantees a complete elimination of organic material and harmful substances.</p> |
