Leaves curling on plants! What's wrong!

Temp is 78-83 w/ lights on w/ RH of 60-70, lights off temp is 68-75 w/ RH of around 58-62. I recently had a nitrogen toxity and I flushed out with pH water of 6.6. They bounced back pretty quick, still have some dark glossy leaves but they're coming back. I just fed them the other day w/ HALF the nutrient dosage per gallon and they seem to be fine other than the fact that HELLA leaves started curling upwards. What could cause this problem? Today is week 4 day 1 in Veg mode, I will veg for this last week and begin flowering.
Please help! Here are a bunch of photos attached.
ALSO, my plants are about 36 in from the light (KIND LED 750w) and my plants stand about 12-13in. Shouldn't they be much taller during this time (it's my first grow) or is this normal? Is the light too far away?

is your air exchange good ?

You over fed N in veg ? that`s tricky to do they could still be reacting to that ?

@THE KONASSURE yes I ended up with very dark green glossy leaves with N toxity. They are bouncing back but after I fed them again they started curling like this

And yes i have a good air flow

maybe try feeding them a bit less

are you ph`ing your water/feed ?

What are you feeding them and how often ?

are they in dirt or coco/perlite ?

Do you let them get really dry or just the dry side of dam ?

some plants in smaller sacks can`t really take getting too dry but then if you over water you`ll get worse problems

I find B-vits can help reduce the stress reactions but only if you`ve fixed the issues causing most of the problems

Have they got a fan blowing on them,by this I mean are the ones curling nearer fan

Yes they have a fan blowing near them,
They're in soil, pH of soil is 7 when I check it. In 3 gallon pots. I feed them 2cups each every 2-3 days

Loudpack415 said:

Yes they have a fan blowing near them,
They're in soil, pH of soil is 7 when I check it. In 3 gallon pots. I feed them 2cups each every 2-3 days

Click to expand...

That doesn't sound like much water at all as far as the amount your giving on watering days

I just fed them today 4 cups each to boost the amount. I turned the fans lower so they wouldn't blow as hard and my temp/humidity still good. However, i noticed that now, one of the leaves has these spots on it. Any idea what is going on with my grow?? This shit is killing me, lol.

Also any idea what this is??

looks like wind damage from the fan and maybe some damage from touching the top of the plant when it was younger ?

Here are more pictures from today.
Gave them 3 1/2 cups of water yesterday with no nutrients and I've moved and lowered the fan strengths.