daima, thanks man for the info.. i am going to chop off some of those bottom yellow leaf's today on one of my plants and see if she survives...

could all this yellowing be a disease that is spreading from one plant to the other?
if it were to be a disease what are the steps one would take to cure a plant of disease? i know cleaning the grow room w/ bleach and sanatizing everything, but how do you cure the plant?
reason i think it may be a disease that is going on in there is b/c on both of my plants that i have NEVER fed any type of nute other than sprinkles of epsom salt, and small drops of SuperThrive, they are now also getting a yellow pigment to them...
the leaf's on those ones are not dying/burning away like the other plants that did get fish emulsion, but they are yellowing...
i am starting to think that i may lose this entire grow b/c the yellowing is now making it's way to the top leaf's on my other plants, and burning the tips..
it was all on the bottom leaf's but now spreading upwards..