You can look up and print out signs of cannabis abuse and it will give you a table of all elements involved in growing and what each will do due to toxicity or deprevation of elements. It could have been then seed but given that you only found them on the bottom it sounds more like stress. Something did it, you just gotta figure it out. So good luck. There is a lot of information on this site. If you go to the hermie forum, I had a lot of educational responses to my hermie problem a few months back. Good luck :smokin: