Nute Lock? Heat Stress? Overwater?

I need a lil more advice on these girls, again 2 wks flowering, leaves are very dark green on top but curling down. Lights are pretty close 10" but I used Phosphoload to halt vertical growth and increase yield. Take a look at these pics and tell me what you guys think. I'm guessing nute lock from what I've read. Since I was locked out of my rollitup I couldn't access the threads I posted and I went ahead and raised nutes to 1500PPM. Next time I top off res I'll lower to 1300. Temp stays between 80 and 85 during light hours humidity is usually 35 to 40%. Pumps run from 12pm to 12am at 20 minute intervals every 3 hours(5 times per day) Thanks again for all the help guys and please advise on my pics.

your plants look good one looked a lil droopy like overwatering

Thanks chi. Do you really think 5 x's per day at 20 min's is too much? Also, the 2 plants that have leaves curling down are the 2 closest to the center of my light which is 600watt HPS horticultural grade.

HMMMM no one else has any input?