I went down that rabbit hole many years ago. If you really want to purify your water (not only form minerals), also from all the pesticides, PFAS, hormones etc... it's an investment...but a really good one...as good water is so important for your health. Of course you could in the meanwhile distill water or boil it twice like the Ayurvedic do...but you want't be able to get out all the poison and also you want to re-inform and re-vitalize your water.