| 摘要 |
An external aquarium filter is disclosed, the filter including a filter receptacle having a filter chamber for receiving contaminated aquarium water and having a clean water chamber. The two chambers are separated by a filter bed, with the clean water chamber being located above the filter chamber, whereby the flow of water is upwardly through the filter bed. A siphon input tube supplies the aquarium water to the filter chamber, and an output conduit supplies the clean water from the clean water chamber back to the aquarium tank. A commercially available aquarium air pump provides compressed air into the output conduit in order to airlift the clean water from the siphon level into the aquarium tank. The filter bed can include a layer of open cell reticulated foam plastic material, such as polyurethane foam, and a layer of activated carbon.
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