Dwc setup, wedding cake strain stopped budding after about a week. I'm currently into week 5 and it looks absolutely identical to what it did 3 1/2 weeks ago. I'm using a 400w hps light on 12s. I use RO water with 2ml per gallon of cal mag. It's a 5 gallon bucket with 3 gallons in the res. I use gh nutrients. Current ppm is about 700 but the plant isn't "drinking". Ph is around 6.0 but it floats between 5.6 and 6.0. Rh is 65%, temp is 72. It does have weak branches and I read where light intensity or the lack of airflow can cause this so I put a bigger fan on it (box fan on low) and got a new ballast and bulb. Still no change. I'm all out of ideas. Can anyone help?