ak 47 problem leaves curling PICS!

this is my 100 watt hps grow wit ak 47. there almost a month from clone transplant. about 2 plants are showing these signs kinda bad out of 8 plants from clones one reveged from my las crop. all plants are showing some small signs. had a small ph problem being to high run of around 7 balance back out by adding water a lil over 5.5. bigger plants have jus started showing signs of wanting some ferts added 150ppm las watering going to add 400 next time. im thinking this might be heat strees or a deficencey from the ph prob. the room almost never goes over 80 but i have been strugiling with this massive light. so heres all my stats-

using fox farm ocaen forest soil with over 2 gal soil, 1 gal perlite/coco, under 1/2 gal castings, 4 tbs dolo lime will add a lil less next time. really like this mix!

fox farm nutes with a lil epsom salt only feed once at 150ppm

room 70-80

tap water at 130ppm

water about 3-4 days apart let the pot get light and dry if i stick my finger all the way in

add 1 teaspoon of fora shield

light is a 100 watt hps with 4 foot hood

fan blowing at the light and a orbital fan blowing on plant the grow area is open in a basement with decent ventalation window open at top of stairs and door left open

sorry about my speeling!!

Looks like heat stress or a fan that is blowing too hard.

Kind

thanks you unity! i have thought of that beacuse the plants that are closest to the fan are doing the worce. i didnt know this can be hard on plants figured it gets alot windyer in nature. ill turn my fan down n see what happens

It might be the fan, in nature there isn't a continus wind blowing on them at high speed 24/7. To much air flow will make the leaves dry out and the will curl from lack of water in the leaf. Turn the fan blowing on them on low and put it far enough away so it is just making them move a little bit. I would say it might be nute burn, but it doesn't seem like you have feed them enough to burn them.

Whats the humidity in there when the lights are on?