| 摘要 |
A filter for aquaria has a bag shape, an outermost layer of filter cloth made of long fiber non-fabric, an inner layer of filter net made of polyester, a mouth inlet formed in one end and the other end closed to form a hollow interior lengthwise passage for water to enter therein. Then filthy water of an aquarium may flow through a connect tube connected to the inlet into the hollow interior passage, and gradually seep through the inner layer of filter net and the outer layer of filter cloth in any direction and of a large area through small and tiny air holes of the two layers to receive filtering process to seep out of the outer surface of the filter cloth and fall into the aquarium again. The filter can be judged by users whether or not to be replaced with a new one by the color of the filter cloth.
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