OK, don't laugh...I mean it...rof.
Oh, and I am not knocking your grow...Starmark, I think they look nice overall, but since you asked and then knowmy asked...well, I will give it my spin

I need a 2 question's answered to make a better assessment,
1. What is your recipe?
2. How hot is it in your room?

...but here go's...In a quick pass, I looked at pix and said that look's like the start of multiple nutrients overdose

1st off, I can't see the colors of the leaves...
I see...burnt tips...curled/twisted leaves...fan leaves pointing to the sky, cupped veiny leaves...

here is the funny part. they have that frazzled cat look about them. That is why my eye saw toxidity...

Now, after looking at them with a little more interest and compassion....I still can't see the colors, but it could be a potassium deficiency...hard to tell

Starmark, could you get some pix without the hps on or put a shade implement in front of it, so to alleviate the Yellooooooooo's

On the subject of flushing/leaching...It would be a good idea if you are in rockwool blocks/slabs at least once a month. IMHO:smokin:

OK knowmy...What do YOU think