I installed a reverse osmosis filter at home and read that it causes the water to be more acidic. To counter that, I've been using this:
[URL unfurl="true"]https://www.amazon.com/gp/product/B0732XG79Z/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1[/URL]
Three drops in a glass of water or cup of coffee. I don't notice any change in taste.