Sounds like you have what we call Clear Water Iron. It will have to be oxidized first then trapped out.
Gary and I differ in our taking iron out with Softeners. I have had just about no luck doing so, nor has anyone else in my area. I'm sure it's because of the different kinds of water you encounter in different areas. What works for you may not work for me etc.
If your into buying one, I recommend you go with Gary. He will take good care of you and he may know something I don't.
bob...