This works very much like an activated-carbon filter for taste and odor. The minerals are actually absorbed onto the medium inside the filter. Unfortunately, it takes a relatively-expensive filter media to remove the minerals from most water. As a consequence, you should only use this on water that really needs to be mineral-free. For example, many RV owners like to keep their rigs clean, and if they use hard water to clean their coach, it leaves unsightly mineral deposits when it dries. Our solution to this problem is to employ a DI filter cartridge to de-ionize water, which we then use to give our coach a final, deposit-free rinse. We sell these DI systems here.
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