do you have any pics of the whole plant from the side? as far as the new growth i do not have a good i dea on why they are pale. what kind of nutes are you using? and whats your ppm on them as well
it might just be the soil, what kind are you using? maybe animals... if its around to where animals outside can easly just walk up to it, it could be from the amonia in animal urine. just a thought