Hard water issues In triplex

[Blake Capson]

I have a triplex where two of the units have water softeners already installed but I do not have space to install an additional water softener in the third unit. Looking to possibly install a scale blaster device on the main water line to see if that will solve the water issues on all three units then I can avoid delivering salt every 3 to 4 months to the other two units.

Has anyone tried installing a scale blaster type device and what results did you have?