Can AquaTru filter water that has been treated in a water softener? November 23, 2019 07:30 Updated Follow Yes, AquaTru can filter water that has gone through a water softener. Related articles Can AquaTru filter well water? Can AquaTru filter hard water? Can AquaTru filter saltwater? Does Aquatru Connect use the same filters as the original AquaTru? How do I know when to change my AquaTru or AquaTru Connect countertop filters?