| 摘要 |
An external type filtration device having a filtration main body adapted to be externally hung on the wall surface of an aquarium fish breeding water tank, comprising a filtration main body (F) adapted to be externally hung on the wall surface of a water tank (V), and a water pump (P) for drawing water int o the water tank (V), wherein the filtration main body (F) is designed to divi de the drawn-up water from the water pump (P) into a first flow to be returned in its unfiltered state to the water tank (V) and a second flow to be filtered through a filtration element and then returned to the water tank (V) dependently on the action of a siphon. This enhances the filtration function due to the filtration element of the filtration main body and the organic clarification function due to aerobic microorganisms and suppresses the clogging of the filtration element, thus reducing the frequency of maintenan ce.
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