Can a water filter harmful substances? Can the common cotton core and carbon core filter most harmful substances? There are many kinds of harmful substances. I don't know if you are the specific one or all. for example, the size of E. coli is 7 microns. In theory, the filter with filtration accuracy less than 7, it is possible to filter out the harmful substances of E. coli, but some harmful substances have small particles, so it is not easy to say, and some are poisonous, such as pesticides and microorganisms, which may be less than 7 microns, therefore, some of them can pass through, which is certain. As for how much, it is necessary to analyze the specific problems that small microorganisms can filter! But it is not necessarily harmful to see what it is! You can filter most of that!
Is the tap water filter useful ?? Is the effect good? The filter is useful, but see what form of filter you choose?Let me tell you how to choose a filter,1. in terms of physical filtration alone, the higher the accuracy of your filter, the better the filtering effect, that is, the impurities that can filter multiple large particles, in microns, (the smaller the Micron, the higher the filtering accuracy), in a unit is the goal, how many items (the higher the precision of the larger the target unit), of course, the filter, there is activated carbon filter in it is no better, this is a physical filter, but the reverse osmosis filter is still doing better. It's a filter of several levels. This filter is better to choose. it can cost a lot less to change the filter element.2. Generally speaking, chemical filtration requires the addition of a cation to replace minerals such as calcium, magnesium and iron ions in the water, so that after the filter, the water becomes a pure water without minerals, there is no nu