How to remove green algae from water filters? Ornamental fish breeding-advantages and disadvantages of bottom filtrationAlthough it is not expensive to buy a set of bottom filter (also known as sand layer filter, bottom wave plate and bottom plate filter), it is effective and does not need special maintenance. However, if there is any mistake, the consequences are unimaginable. When this filter came out in China in 1988, aquarium fans just blindly follow the advertisement and don't know anything about its operation principle. After a period of use, the problem continued to appear, and then made another evaluation of water quality pollution and indirect death of fish. In fact, the reason for this adverse effect is due to the fact that most aquarium enthusiasts do not know the operation skills and practical value of the underlying filtering.The main function of underlying filtering is to provide biological filtering efficiency. In nature, both in the ocean and in the lake, there are two kinds
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