condition mean min max 12pM Fe,Midday 19.3674 19.3674 19.3674 12pM Fe,Midnight 22.2502 19.2484 25.252 58pM Fe,Midday 11.9032 11.9032 11.9032 58pM Fe,Midnight 16.661571428571428 0.0 21.9611 233pM Fe,Midnight 15.313533333333334 15.0322 15.8272 1160pM Fe,Midday 13.766157142857143 12.3871 15.5676 1160pM Fe,Midnight 8.764196666666667 5.64404 14.4691 High carbon,Dark 12.783626 6.83006 23.8775 High carbon,Light 7.967430769230769 1.68006 15.7784 Low carbon,Dark 9.92199 9.92199 9.92199 Phloroglucinol 9.35962 6.81536 13.0 Silicon starvation,12h 22.9617 22.9617 22.9617