for fish tanks? Ordinary sponge can not be used as filter cotton for fish tanks. Filter cotton has two characteristics, one is to filter impurities, and the other is to ensure the passage of water. Although ordinary sponge has the function of filtering, it is too slow to pass water, so it is easy to block, and the effect is not good. If you really want to replace filter cotton, stockings are a good choice, because they are very thin, so the water flow can pass quickly, and impurities can be filtered out.
of filtration? 1. Physical filtration: Physical filtration is an essential way of filtration for fish tanks. Its function is to intuitively improve the turbidity of the water body and make it clear. The particles suspended in the water, whether they are residual bait or other things, will be filtered out by the filter cotton, so that the water will naturally be clear.
2. Biofiltration: Biofiltration is mainly to establish a nitrification system. Although the microorganisms in the water can decompose the residual bait and feces, the ammonia nitrogen produced can not be treated. Nitrifying bacteria can convert it into nitrate, thus avoiding toxicity to fish and improving water quality in this way.
3. Chemical filtration: Chemical filtration is generally used to improve water conditions through various chemical reagents, such as flocculants, algaecides, etc. It should be noted that no reagent should be excessive, otherwise it may cause certain phytotoxicity.
