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 0.0 0.0 0.0 Dark 0.5012089333333334 0.0 1.0024178666666668 Light 0.5273469230769231 0.5273469230769231 0.5273469230769231 Phloroglucinol 0.0 0.0 0.0