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What is the role of the filter used to raise goldfish? The water in the fish tank will be contaminated by fish feces, food residues, aquatic leaves.In people's imagination, the suspended matter visible in the water is filtered out,The purpose of keeping the water clear and transparent has been achieved,In fact, this is only the primary function of filtering,We usually call it mechanical filtration.The modern ornamental fish tank filtration should have mechanical filtration at the same time,It also has the function of biological filtration,Physical filtering is also needed sometimes.One of the most important is biological filtration.The so-called biological filtration,It is through bacteria attached to the filter material,Decompose or convert harmful substances dissolved in water into harmless substances.Physical filtration is to use the unique adsorption function of some materials to make water purification.Physical filtering is used for a short time under special circumstances,For example, in order to remov
