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养过鱼的人都知道水的重要。简单划分,鱼缸的水有四种:第一种是新水,也就是刚刚晾好的自来水或新打的井水。第二种是老水,里面有部分微生物,呈浅绿色或是淡琥珀色。第三种是绿水,含有有机质较多,会发出臭味。第四种是回清水,虽然清澈无比,但氧气含量很低。用这4种水养鱼的效果截然不同。新水尽管干净,但由于没有细菌群落,鱼的排泄物、散落的食物残渣腐败变质后,鱼儿极易中毒。绿水则是有机质含量过多,蓝藻、绿藻及褐藻大量繁殖,细
People who raise fish know the importance of water. Simply divided, there are four types of aquarium water: The first is the new water, that is, fresh water or freshly drilled well water. The second is the old water, which has some microbes, was light green or light amber. The third is green water, contains more organic matter, will issue a smell. The fourth is back to clear water, although very clear, but the oxygen content is very low. With these four kinds of water fish are very different. Although clean water, but due to the absence of bacterial communities, fish excrement, scattered food residue spoilage, the fish extremely poisoning. Green water is excessive organic matter, cyanobacteria, green algae and brown algae multiply, fine