The Magic of Manganese Dioxide: What It Is and Why You ...
Greensand is an industry standard going back decades. It is a mined zeolite that receives an MnO2 coating. Note: Due to diminishing supplies, companies are manufacturing replacements for greensand. These manufactured media, like greensand, require regeneration with potassium permanganate (KMnO4) to retain their MnO2 properties.
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