why are my topmost leaves curling like tacos

so my problem is this, one my plant has been under some major type of stress for the last few day and i was trying to see if i could mellow it first but i have had only minor results.it just started flowering and has had a hella lot of inner foliar growth but i havent really changed anythin personnally.at first i tried to have my light closer and they started curling the EDGES not the points up towards the main light, then i have raised the light and they curled a bit harder i think. Its literally only the newer top most sets that do it. i will have the pics shortly
here is my form.

E-indoor
E-soil
E-ocean forest
CSL-organic foxfarm
SCL-vigoro seed dry fert. very light dose
SCLR-6.8
E-distilled
E-distilled
E-3 mos
E-foxfarm grow big and tiger bloom
E-Rate of application-2 x a week
E-400w metal halide 1 1/2 ft
E- 75-70
Hd-78
E-Lighting schedule-12-12
E-Type of ventilation your room has-open air box fans
TR-Did you pre-soak your media in pH corrected solution?-no

I'm guessing....light/heat stress? Some 400 watt metal halide bulbs, throw off too much UV rays. MH is not as forgiving as HPS rays. And different reflectors may cause hot spots.

If you can't raise the light more?...try offsetting the plants some....not directly under the bulb. I had this problem, once too.

have you transplanted lately?

distilled water is not the best thing to use either

hey thank you PIMP im kinda guessing the same thing, its really not too hot between the bulb and the plant and i could lower the plant more if ncessary, my light can adjust and i also have crates for the plants.its been quite a while since i have trans and i just started flowering, i was hoping to finish in this pot also. i need to water but i hate doing it in the middle of the day, i think imma just go and do it.lemme know more bout to post the pics.:trooper:

i also have sme really deep stemmage out to the fan leaves what is up with that? i mean it has a great look but just curious.

fist is area then pics of my big momma the my lil duder.lemme know whatcha think i might be trippin, i have watered and they have laxed quite a bit, they mostly curl up in the morning.

fa sho

looks fine to me.

they look fine just dont overwater.. maybe pull the light away by an inch or 2

no i assure you i am not overwatering and the plant pinche booming!!will post first pics of the first female hairs and bud sites, this plant is loaded.

You need calmag with your distilled water or you are going to run into problems REAL fast. FYI.

i have been waiting for you to grace one of my threads being u are the all knowing, when i had originally posted i was using distilled but i have switched to tap seeing as i cant seem to find cal-mag any where except for my hydroponics shoppe and that is a ways away from home and i havent had time;so i switched it to tap.i have had fine growth nothin really slowin her down. thank you. STINKYATTIC what can i be watching for? please do tell and dont spare the gruesome details. thank you thank you.:stoned:

There are two things. One is falling soil runoff pH. This will show in lockout conditions and can be very dangerous.
The other is straight Calcium deficiency, which starts as low leaves looking yellowish as if they need Nitrogen, but they have pale tan dry blotches of irregular shape starting at the edges.

ballin, im looking into all of this now.You are always extremely helpful to everyone on site.ill let ya know how all goes.