I'm no expert, I'm on my third indoor grow now but i would just watch them and see if it happens to the more mature leaves. Doesn't look like you over did it on the flood time of your system and doesn't look like anything I've seen neauts do either. Is your light fixture air cooled? If not watch the heat level that reaches your babies. I have a friend useing 400w hps not air cooled with a built in balast and he keeps his light like 36" away at all times or risks cooking them. I didn't really think simple sugars help much in the vegatative state. I use Bud Candy and Black Strap Molasis in my flowering stage but not when vegging. Hope this helps :rasta: