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An example: Ammannia pedicellata. Recommended pH value: 5 to 7. Recommended alkalinity: 2 to 12 °dKH. Put together: at pH 5.0, with alkalinity 2 °dKH, the Tillmanns' chart returns CO2 content 703 mg/L. What do you think about such a recommendation? There are plenty examples of this fault in...