condition mean min max 12pM Fe 0.0747195 0.0 0.149439 58pM Fe 0.0082985 0.0 0.016597 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.0 0.0 0.0 Dark 0.40048286666666666 0.242832 0.5581337333333333 Light 0.4928236153846154 0.4928236153846154 0.4928236153846154 Phloroglucinol 0.323592 0.323592 0.323592