condition mean min max 12pM Fe 0.104003 0.0 0.208006 58pM Fe 0.024447 0.0 0.048894 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.0121445 0.0 0.024289 Dark 0.4709488666666667 0.28295173333333334 0.658946 Light 0.8065707692307692 0.8065707692307692 0.8065707692307692 Phloroglucinol 0.0 0.0 0.0