Help Identify my plant's Issue.. Includes PICS..

These plants are only a couple weeks old, very young and small.
Some of the leafs are showing symptoms i cant identify.

Im in a hydroponic ebb&flow system, using pureblend pro.

Here are a handful of pictures of different plants symptoms.
Some have similar symptoms, some are different.

Please help me identify the problem.
Deficiency? Overdose/burn? What do you guys think this is?


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PLEASE HELP ME IDENTIFY THE PROBLEM(S).. I THINK IT MAY BE A COUPLE DIFFERENT THINGS.
THANKS!!

Too much fert

Yeah, i lowered the PPM's down to 460 ish and they seem to be doing better.

What would you say the perfect PH for my babys in week 1 would be?
Also what would you say is the best reservoir water temperature? right now its at 72f..