Tags: chemistry* + coffee*

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  1. total hardness of 50-175 ppm CaCO3 (2,9-9,8 dH°)
    carbonate hardness of 40-75 ppm CaCO3 (2,9-9,8 dH°)
    total hardness should exceed carbonate hardness
    pH of 6.5-8  
    2017-09-28 Tags: , by klotz

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