After all the technical mumbo jumbo that's been posted over the last few days on the iron subject, and still left nobody any the wiser, I'm thinking it's maybe better to just focus on the simple things that will make for a healthy, attractive tank.
I don't see a correlation between those who want to turn their hobby into an exercise in rocket science, ( well some of them anyway ), and the health of their tank.
Me, I'm out of the iron debate, it's given me a sore head, that's about it.
Maybe when I'm feeling better, and my long time protagonist has something to say that's worth hearing.