condition mean min max 12pM Fe 0.0 0.0 0.0 58pM Fe 0.0 0.0 0.0 233pM Fe 0.0 0.0 0.0 1160pM Fe 3.98355e-06 0.0 7.9671e-06 Dark 0.0 0.0 0.0 Light 0.0 0.0 0.0 Phloroglucinol 0.0 0.0 0.0