I've got 8 5 gallon dwc buckets with 6 different strains and none are barely showing any flower.just a few hairs The ph is right no light leaks ppm is right around 1000 bubbling great plenty of ventilation and air moving around. I've been doing dwc ebb and flow and soil for years and never had this problem. They're about 2 months from seed by the way...any ideas?