Jesse I think its either roots arent getting sufficient oxygen or you have a Iron or Nitrogen deficient plant. When plants dont have enough oxygen to the roots, they start developing root rot and feed off their own leafs. But, I just noticed that if it was a root problem the leaves would be droopy (very droopy, hanging like wet pieces of toilet paper) What are you feeding the girl? Give me a list of your feeding ratio and schedules and your soil. Also would help with updated pics.