Iron In My Water
OK--Did the system work to your satisfaction when first installed? How long has it been installed?
From the picture it appears to be air injection in the first tank and then a second tank with media. Culligan sells a mixed media under the name rust master that includes neutralization for acid water, a catalytic media to speed the oxidation process of the clear water iron into a form that will precipitate and can be filtered, and a media to filter out preciptated iron and clarify the water.
Mixed media cost less to install--only one tank but maintenance is the downside when there are problems.
If the unit worked when new it may only need some maintenance and perhaps new media in the second tank. One of the issues with air injection is that in iron laden water the injectors get plugged up and then the air injection doesn't work. If the air injection doesn't work then not all the iron is oxidized and if not oxidized it can't be filtered out.
Have you contacted Culligan about the problem--what do they say?