Water filters are known for their water purifying capabilities and their efficiency in removing undesirable water ingredients, but what about healthy minerals? Are these too removed during the filtration process, leaving your tap water slightly unpalatable?
The answer to this question depends on the water filtration technology used by your water filter system: Some water filters do remove healthy minerals, others will retain them, removing only contaminants.
This problem will be solved by adding a remineralizer filter in the last stage of the filtration process. Sometimes these filters are called an Mineral Water Filter Cartridge, but the goal is the same: to reintroduce trace amount of healthy minerals that were removed by the powerful filters in water treatment system.
Water Filters That Don’t Remove Minerals from Tap Water
Activated carbon and ceramic filters don’t remove minerals from tap water. Thus, carbon-based or ceramic filters all retain healthy minerals in your tap water, all the while removing dangerous contaminants.
As a general rule, activated carbon filters are best at removing contaminants attracted to carbon (a process called adsorption, which occurs due to the fact that carbon has a greater attraction to the contaminant than the contaminant has with the water.
Thus, carbon filters will remove chlorine, VOCs, THMs, but not minerals, salts, heavy metals, etc. Therefore, contaminants not attracted to carbon — and that includes healthy minerals as well — will not be removed by the filtration process.
With activated carbon filters or ceramic filters, you won’t need to add a remineralizer or alkaline filter to your system.
Carbon filters are sometimes paired with ceramic filters to make up for some of the shortcomings of carbon filters (e.g. to make up for the fact that carbon filtration is not enough to remove viruses and other pathogens from your tap water).
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