Pyrolox vs. Birm media for iron removal


anyone have any experience or insight on the relative performance of these 2 media for removal of clear-water iron?
thx, w
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found 2 PDFs @ the clack website:
http://www.clackcorp.com/water/pdf/pyrolox.pdf http://www.clackcorp.com/water/pdf/birm.pdf
walter

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