condition mean min max 12pM Fe 0.0 0.0 0.0 58pM Fe 0.15836857142857141 0.0 0.31673714285714283 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.307769875 0.0 0.61553975 Dark 0.9162667333333333 0.0 1.8325334666666666 Light 3.214036076923077 3.214036076923077 3.214036076923077 Phloroglucinol 3.392238 3.392238 3.392238