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About product and suppliers:
        Alibaba.com offers 8,819 bio filter products. About 61% of these are water treatment, 13% are aquariums & accessories, and 1% are water treatment chemicals. 

A wide variety of bio filter options are available to you, such as free samples, paid samples. 

There are 8,729 bio filter suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and South Korea, which supply 96%, 1%, and 1% of bio filter respectively. 

Bio filter products are most popular in Domestic Market, North America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,720 with ISO9001, 673 with Other, and 104 with ISO14001 certification.