120 ppm of chlorine in pool

[smallpooldad]

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

[JohnT]

I'm pretty sure bacteria don't create iron. There are bacteria that eat iron, but they are anaerobic, so they wouldn't be an issue in a pool.

[smallpooldad]

That is what I thought.

But Section 6.12 on page 26 states;

"Dissolved iron in irrigation water is usually caused by microbial
activity."

And;

"Iron bacteria are notoriously difficult to kill, partly because they
may live in the irrigation well. Periodic acid or chlorine
treatments of the well are sometimes effective."

On page 13 it suggests;

"At higher concentration (100 to 500 ppm) it can oxidize organic
matter, and can be used to disintegrate organic materials that
have accumulated in emitters."

Any thoughts.

[smallpooldad]

John,

You peeked my interest so I researched further and indeed they do exist. The following American Ground Water site has an interesting article on it see link below.

The problem is I would need 90 gals of chlorine to kill the little critters 1:100 if one reads the article. So I think I will just have to live with them.

Thank you for helping me think.

http://www.agwt.org/bacteria_info.htm