Hi all so last weekend i turned my gfo reactor off. Media had exhausted i thought and po4 holding stable 0.04 to 0.07. 2 days later my sand bed is dirty. I cleaned the sand yesterday around 2pm and the pic attached is at 9pm under whites. No3 10.0 po4 0.07 as of last night with gfo running again diatoms, dinos ????



