I wish I could speak to the iron out, but I don't have any experience with it. However, there is another SLAM was just not clearing up and they finally went with alum and it started to clear. Hopefully someone with experience will chime in or you could search the forum for iron and see if you find a history, I have learned that sometimes unusual circumstances require additional methods, but I do not want to be the one to recommend with my limited experience.
I do want to say I love how you are just tackling your problem with a great attitude. I know it's frustrating!
[emoji176] Lisa P.
Sent from my iPhone using Tapatalk