condition mean min max 12pM Fe 0.0 0.0 0.0 58pM Fe 0.011707442857142857 0.0 0.023414885714285714 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.04760040952380952 0.011774233333333333 0.08342658571428571 Dark 0.0986593 0.0418686 0.15545 Light 0.3143360769230769 0.3143360769230769 0.3143360769230769 Phloroglucinol 0.0 0.0 0.0