Note that machines are machines, and it is impossible to tell whether minerals in water are beneficial or harmful, let alone only remove harmful minerals and keep beneficial minerals. Don't listen to the nonsense and jokes on the first floor.
If you want to buy it, the most important thing is to look at the brand water purifier (suitable for the north) or water purifier (suitable for the south) that can be bought in local shopping malls. The working principle is basically the same. In the case that the water quality (pure water or mineral water) is not much different, it is mainly professional (for example, everything is beautiful, usually OEM, and the professionalism is not enough), and the after-sales service is good. The after-sales service of the water purifier is the key, and the filter element should be changed frequently in the future. It is not recommended to buy it online, and the quality and after-sales are not guaranteed. Although the internet is cheap, but be careful to take advantage of small things and suffer big losses, and you can't find after-sales service. General agents don't serve online shoppers (no company does). Yikou is the best soft water in Xuzhou, Langmu and Du Ya are good pure water, and Langmu is better in pipeline machinery. As for water purifiers, water purifiers and direct drinking machines, they are not suitable for places with high water and alkali in the northern region. The core of the water purifier is the filter element. Look at Yikou's water purifier and you will know the future development trend. The integrated filter element is convenient and sanitary to replace.