What is this!!! Why leaves get this ???? (PICTURE)

3 weeks in Areo system .. wonding why Leaves do this ..
room temp 70
ppm 700
ph 5.6
I used all AN nutes
Please help me to solve this before it died thanks

Anyone ? any PRO out there ?

Im not familiar with aeroponics but ive seen this happen to my soil plants and it was nitrogen deficent and when it gets bad enough it causes those foliar spots usually after the leaf has been pale green for awhile.

how closely did you check for bugs....mine looked like that after spidermite and i didn't even notice the fuckers were on the leaves until it was too late

There no bugs there nothing .. i spray them with purespray and 3 days later then it happened ..

I'm no pro. But I would like to guess magnesium deficiency.

using RO are distilled water?

RO water .. why ?

How old are the plants, and what stage of growth (e.g. veg, flower)? I'm guessing these are clones, how long have they been in the aero? If they're more than a couple weeks, it's time to increase the nutes to around 1200 ppm @.7 conversion.

Yes they all are clones .. i veg in areo 1 week before flower so it now 3 weeks flower ... you got any idea /?

Usually when the edges of the leaves turn up like that, it's related to heat issues, or having the light too close to the plants. Can you upload a few more photos, and give more details about your setup.

you said you sprayed them,STOP spraying them youve cooked them,when you spray MJ plants the leafs are not good at taking moisture,whether lights are on/off, if lights are on, the moisture magnifies the light and heat both and the leaf will die quickly turning brittle and will crumble in your hand,if you spray at night the leaf will mould and they will die through rotting,then you lighs will come on and bake the crap out of them,its a very good grower that has spraying down to a fine art,and never met anyone who says its worth it