plants not looking too good, any suggestions?

hey guys, been reading up like crazy on how to do this right, massive respect to all you guys pioneering the craft.

i can't seem to find any pics that match what my plants are doing to self diagnose...they're getting yellow spots, then it covers the whole leaf as it dries up and flakes off...they're about 3 weeks old, keeping the pH solid and changing water every week. used half a small aerogarden nute in week 2 and put a little grow-big and big-bloom in for weeks 2-3.

this is pretty much a test run with some old seeds before i get too concerned with the health of the plants, but i do not want this to happen the next time....any thoughts about what i can do to cure these little guys?

possibly root rot?

well heres a few it could be:

maybe the lights are too close? or maybe Root rot like xcp said, you can get that from leaving available holes on your AG open. and i can see your growing atleast 3. and an aerogarden can not grow anymore than that without problems, because all the plants are fighting for the nutes:/

and don't worry my man im an AG noob too hahaha.

Good luck!!

anything i could do if it is root rot that'd save 'em? (rinse off the sponges and seal up the top side?)

i'll look when i get home tonite...could possibly be that the lights were too close, but i'm wondering about the rot

...3 is all i'm working with, i'll probably spread 'em out across the front row once the light needs to be raised...thanx for the help