I have them watering every 3-4 hrs. all night long, since this problem stated. Before that I watered two times a day. They are on a timer that fills in 15min sessions then drains. I even water them one time while they sleep on my 18-6 just to keep water moving. I have 30 gallons in my res. 2 12" airstones that run constantly ph is around 6.0 always and the ppm's are at 590 right now. So tell me your thought, please