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Author Topic: red fouling.  (Read 11039 times)

Offline Pete G.

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  • Posts: 2013
Re: red fouling.
« Reply #25 on: August 19, 2010, 03:23:15 AM »
I live where low humidity means about 75%. All summer long we have 90+/90+ days and the red shows up then also. It is left over sulphur.
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