What is the role of polyphosphate in the pre-filter of the water purifier? According to the National Safe Drinking Water Regulations, TDS is less than 1000. some people say that the healthy water standard stipulates that TDS is seriously wrong between 0 and 50, misleading consumers. small 50 is the standard of pure water, not the standard of health. the most ideal TDS value is 300, which is recorded in the book . This book was written by Dr. Martin of the United States and translated by Tsinghua University. the smaller the TDS value, the softer the water, the greater the chance of heart disease by drinking soft water ~ 15%. children can easily suffer from cartilage disease after drinking for a long time. now many areas, such as Shanghai, have issued a document to prohibit the installation of pure water machines. in foreign countries, no one uses pure water as drinking water, all of which are industrial water. in addition, in China, merchants call pure water. i'm sorry to call pure water directl

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What kind of water purifier is good, don't pure water, water purifier that can keep minerals, what brand is good? Chaoyu water purifier is better. now the water pollution is serious. the use of water purifier can reduce the risk of illness from the mouth. So, what kind of water purifier is better to choose?The water purifier on the market can be divided into two types: filter and pure water machine. their advantages and disadvantages are:Advantages of filter: large water output, low price, no need to plug in electricity, no waste water (or very few waste water), convenient maintenance, mineral retention and beneficial trace elements of the human body;Disadvantages of filter: the filtration accuracy is not high, and calcium and magnesium ions in water cannot be removed (it is better to use it with other equipment );Advantages of pure water machine: high filtration accuracy, safer and more assured to drink;Disadvantages of pure water Machine: The water is slow, the price is high, the filter element is di