yeah, the water that comes out of the pots. I water with 6.3 but I continually have to change it according to the mediums ph. Nutrients wont help since your plant is locked out. Your mediums ph is off causing all of these problems. Transplant into new soil, and buy a soil test kit. Adjust watering ph according to your reading. If you dont have a digital ppm/ph/ec meter by now, this would be the time to invest some money in one. If not, just start a fresh grow, cus you wont be able to save it.