Product Features 
This Alkaline pH filter for Reverse Osmosis systems is an inline cartridge with mineral balls, calcite media.
The alkaline filter improves the pH value of the RO water which could be slightly acid after the reverse osmosis process. 
It also back healthy minerals such as ionized calcium, magnesium, sodiumwhich were taken away during the water purifying process. 
This filter is capable of increasing the pH value of the RO water by 0. 5 to 1. 2