We have installed a filter in our house. However, it is solely for lime, as we have quite a high water hardness. Since we were planning to get a water softening system anyway, we also researched the topic a bit more. The opinions on this are diverse and very diametrically opposed. In the end, we decided against filtering out more than lime because "overly purified" water is said not to be healthy either. So, in other words, if you remove all minerals and everything else as well. Additionally, the more filters you install, the more these filters can become clogged with germs.