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? How do I know when to change my AquaTru or AquaTru Connect countertop filters? Does Aquatru Connect use the same filters as the original AquaTru?