| 摘要 |
An external type filter structure for an aquarium includes a box-like body, which is provided with first and second chambers. The first chamber is provided with a bent extraction pump guide tube. The second chamber has a drip case which has a plurality of through holes and a filter sponge disposed at an upper end thereof. A partition plate is disposed between the first and second chambers such that, when the filter is hung on the aquarium, the extraction pump guide tube pumps the dirty water into the first chamber. The water overflowing from the first chamber flows via an upper end of the partition plate into the second chamber for filtering via a filter mesh and the drip case to thereby enhance the filtering effect and permit culturing of nitrogenous bacteria and decomposition of impurities such as ammonia in the water.
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