Has anyone ever tried over 100 ppm of chlorine in their plaster pool?

What would be the negative effects?

The reason for asking this question is that I have always had an iron staining problem and according to the white paper (link listed below) it could be due to bacteria that creates iron but cannot be killed unless the level of chlorine reaches above 100 and up to 500 ppm.

Any thoughts would be welcome.

http://srwqis.tamu.edu/downloads/SoR...MaintGuide.pdf