@donasmrs-- If the softening system is fairly old, it probably does need new resin. I have never changed the resin myself. My husband does it an it saved us a lot of money last time. So if you can do it yourself, I recommend that. You can probably find instructions on how to do it on the manufacturer's website or you could call them for help. But getting the resin online or from the store and adding it yourself is much better when you're trying to cut down on costs.
Our softener resin was golden color beads. I think most of them are the same and work with most systems and manufacturers.