Easy to install and gives the water a nice taste.just remember you to use them every two or less else bacteria may grow

Excellent performance from these remineralization filters. They consistently add approximately 30–35 TDS/ppm back into the water, which significantly improves taste and mouthfeel. Without remineralization, RO water can taste flat or “empty,” but these filters restore a balanced, clean flavor.
A great solution for anyone looking to maintain purity while enhancing overall water quality

How log do they last? They are black so I can't write on them. I can't remember when I changed them. They should be white so I can marksalot them.

Great product

I like the idea of being able to put the minerals back in the water that it naturally has