the ph is 6 in that general area ,its the same its always been i dont need to adjust the ph at all.the system is a flood setup w/25gallon res. the flood tray is 2x3 ft.it runs 3-5 cycles per 34hr. one cycle takes 10-15 minutes and it floods to the surface of the cubes.lighting is 250 hps x 150hps. ambient air temps are perfect 71-74. when i spray them i spray a very fine mist about 2hrs after the light goes on,i apply 2-4 light mistings on days i mist.

i was thinking it looks like a nitrogen is to low.i just emptied the rez and refilled it with water after it gases off and gets warmer im gonna use a plant food with more nitrogen.

water temps are average 69f-72f