It depends on whether you're dealing with a specific sediment issue or not. For instance, a water softener system can provide a means of removing hard water calcium and magnesium minerals, a certain type of sediment that can leave "hard" scaling in your home's pipes and plumbing. Aside from magnesium and calcium, a water softener system might also remove iron and manganese, but not all water softener units are capable of eliminating rust, so be sure to keep that in mind during your search.