Just bought a house, and I don't really understand how the water softening system is set up. Here's my best guess:
Water from the well is pretty hard, and very iron filled. It smells enough to smell it across the room. But: it does not smell like sulfur.
First the water goes through a water softener with a brine tank. Water at this point smells faintly of iron, but is much softer and still does not smell like sulfur.
After that it goes into another tank that looks like a water softener, (I can even force it to do a backwash) but has no company or product names on it, and no brine tank. I'm guessing that this is an iron filter. (Though I'm not sure why it would be after the water softener, because it seems like the softener is taking the bulk of the iron out.. And can't that foul the resin? I digress.) At this point the iron smell is completely gone, but now the water smells of sulfur.
It seems pretty clear what the problem is: sulfur contamination in the iron filter.. But from everything I can find online, that shouldn't be possible since most iron filters are sulfur filters.
Anyway, how far off am I from what my actual setup is, and how can I clean this tank?