dude im no expert, but i have never not harvested a plant that i was growing, anyways if that would have happend to me i would have went back to veg after flushing with a few gallons of ph adj. water fed nothing but water for a week then start back with 1/2 strength nutes for a week and then resume the normal feed schedule if it made it that far. i dont like to mark my jugs., for security reasons but i have used a peice of tape to label mixes and then remove when i disposed of the jugs i rarely keep ph adj water around since you still have to adj after adding to your resv , alltho after a while you get to know your plant and usually know exactly what to do as far as daily maint, but thats me , sorry for your troubles, funny thing is that youve probably learned something here that youll nvr forget