Ph imbalance, nute toxicity or overwatering, which is it?

[CapnCannabis]

From what I can see the plant looks like it’s losing nitrogen from the bottom leaves and putting it in the top leaves.I’ve had this happen to me this year and I started ph ing my RO water again at 6 and it fixed the issue somewhat over time.I was just giving them plain Bottled water with a nutrient rich soil and it was bound to happen.I had all that good food in my soil no vehicle to put it where it was supposed to go.You’ll get new growth but the affected leaves are going to fall off can’t save them.