Get a distiller (I use megahome) and remineralize it. I run a gallon before I go to bed and it’s the purest water you’ll ever taste. These are the trace minerals I use. Extremely pure.

Anderson's Sea M.D. Concentrated... https://www.amazon.com/dp/B0028BW0IO?ref=ppx_pop_mob_ap_share

I have a Berkey I bought around a decade ago and recently tried taking it out of storage. I think it’s ok but the water is not as pure as distilling your water.