grout turnning black

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grout turnning black

Postby belize » Mon 30 Oct, 2006 17:35

I live in a very warm climate, sometimes the water gets as high as 90 degrees. It is a salt water pool and everything check out good. It is tiled but I'm starting to get black staining in the grout lines. I've stied scrubbing it off with little to no results. What is my problem?

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