Because all water ionizers require minerals to perform ionization and some homeowners use Reverse Osmosis (RO) water filter systems to strip their water of everything including minerals, we offer a Re-mineralizer Filter to add minerals back into the water before ionization.Replacing minerals in your water supply is not a job for amateurs. We have seen many dangerous re-mineral products on the market including Ceramic coated minerals that have no proof of actual ingredients, or Coral products that contain high levels of Aluminum and Arsenic; and even unhealthy forms of Calcium such as Sulphates.Low quality Re-mineral formulas also do not break down at the proper speed giving you too many minerals in the first month of use, and not enough for the rest of the life of the product. The Chanson inline Re-mineral has proven to give consistent mineral levels from start to finish, as long as 14 months in some cases!We are proud to offer our Calcium Carbonate, Magnesium Oxide Re-mineral formula. This mineral formula has Calcium and Magnesium in their perfect ratios for long term health results. During ionization, the Calcium and Magnesium in our Re-mineral formula are changed to more absorbable forms, they become "ionic" minerals.Our see through design let's you see the minerals, there are no secrets here!! No need to fight a filter housing, or change a messy filter. Our hassle-free design allows you to remove the old filter, housing and all, and snap a new one into place quickly and efficiently.We are proud to use only the highest grade ingredients from the actual minerals, to the filter housing and connectors, making this both the safest and best performing Re-mineralization unit on the market.