condition mean min max 12pM Fe 0.0 0.0 0.0 58pM Fe 0.03835407142857143 0.0 0.07670814285714286 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.020946375 0.0 0.04189275 Dark 0.0 0.0 0.0 Light 0.2781030769230769 0.2781030769230769 0.2781030769230769 Phloroglucinol 0.0 0.0 0.0