I ran into this on my last grow. If you don't typically overwater, most auto's can take an over watering every once in a while. I had to go out of town and the waterings just didn't space themselves in my favor, so the day of I specifically over watered it, and then I added 2 water globes as well. That is just water. Nutes are nutes if you over do it, they burn under do it, they become deficient. In the end Cannabis is an overally developed weed the can take some unfavorable conditions . Just make sure you let the plant get near bone dry.