Hey guys! This is my first time growing indoors and has been a pain in the butt so far. I have a royal gorilla auto from seedsman that is in its 2nd week of flowering. I’ve been giving it water ph at 6.5 and bloom nutes at 650 ppm. A couple days ago my plant started to have yellowing leaves on the bottom fan leaves but is now spreading to all fan leaves. Any ideas to what it could be?