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What filter material is good for sea water? The filter materials used in the biological filter box are biological balls, porous glass ceramic rings, ceramic columns, etc. it is mainly ammonia and nitrite in the filter water. it is the life activity of using nitrobacteria, convert ammonia and nitrite dissolved in water into nitrate and nitrogen that are harmless to fish, which is a deeper filtration of seawater and a third filtration of seawater | In marine fish aquarium, there are many filter materials used, including activated carbon, coral sand, sponge, etc., biological balls, porous glass ceramic rings, ceramic columns, etc.Biological ball is a hollow sphere made of plastic material, which has a large surface area and can attach a large number of nitrobacteria.When the water flows through, there will be no resistance. the hollow structure can turn the water into a fine flow and break the large piece of dirt. the filtration effect is excellent.Due to the light weight and convenient carrying of biological