what is this?

I have looked all over and dont know what this is.It starts as gold spots that slowly turn the leaf brown and curls the leafs upward. the leaf does not feel crispy or dried out when its fully ate up,but feels kind of soggy.
I grow in an ebb and flow table,Pea gravel and coco croutons
I use flora nova grow at 590 ppm, fed twice a day for 15 min.
my water is R/O. ph is at 5.95
All under a 400 watt HPS
I flushed yesterday with 15 gallons of water (5 pots 1 gal a piece,Three gallons for every pot) and continued on the regular feeding schedule,but the problem still persists.
does anybody have a clue to what this is?

Plants are dead THANX alot everyone for saying,oh thats right nobody answered
FUCK THIS SITE
Ive had problems all along like everyone else and this is what i get.not one fuckin response.this isnt the first time but it will be the last
fuck all you

your attitude sucks, but i am pretty sure whatever you have is what i have

i know exactly what you have ...DEAD PLANTS....... lmao just kidding. mine started to do that very same thing when i was late changing my water and nute strngth. i raised my nute str and changed my water and started using 32% hydrogen peroxide solution at 1.7ml per gallon. hope this helps in case you run into this again

it's not no ones fault but your self dude.. don't blame your promblems on some one else thats not going to get you ne ware

....shut your mouth when you talk to me! .....sofa king we Todd did!

You know, This post sat for almost 2 weeks before someone answered it thats where my attitude as you call it,comes from.This is not the first time i ask a question and get no responce. i cant see how anybody can grow a f'kn string bean let alone marijuana from this site.Its full of misinformation and people who dont really give a fuck.This site is supposed to be to help each other out but every single question (except for one question, it was an easy one,got like 35 posts) ive asked goes unanswered until i rant and then all of a sudden i get 6 or 7 posts 3/4 of which just want to give there phsyciatric opinion(of which i dont really f'kin need) and one that kinda skims the topic.I ask questions cause i dont know, appearently very few people on this site know much of anything about growing for if you did you might help a brother out.

bannaboat said:

it's not no ones fault but your self dude.. don't blame your promblems on some one else thats not going to get you ne ware

Click to expand...

Why have you posted on my question if your not going to provide something usefull.Do you really think i need you to tell me whos fault it is?Your the type of people im talking about,just type to see themselves type and dont answer a god damn thing.
Just for your little brain to mull over,Im not blaming anybody for my plants,but when i asked for help,nobody steped up.
Once again thanx guys for your...............................................

rebelmandziukan said:

i know exactly what you have ...DEAD PLANTS....... lmao just kidding. mine started to do that very same thing when i was late changing my water and nute strngth. i raised my nute str and changed my water and started using 32% hydrogen peroxide solution at 1.7ml per gallon. hope this helps in case you run into this again

Click to expand...

Hey thanx man, finally an answer.Right or wrong i got an answer.Well on my next go round i will try the hydrogen peroxide. Thank you

Looks a bit checkered? possibly magnesium def. or boron def. hope it helps.

next time relax and ask again...maybe before they die. all i saw was 1 post in this thread from you before you went nuts. i could understand if you had posted more than once in the thread - maybe explaining how dire your situation is, before spinning out and telling us to fuck off.
sometimes we need to do some research on our own....especialy if your questions are not being answered. dont blame us because you plants died for not answering your question, ask it again, and again, if needed.... do your own research, we are not required to help you....but we will when we can. and we all have had our times with dead plants, so join the club. learn from your mistakes and move on.

i have researched the problem and come up with 3 possible causes,hence the reson i ask the questions.ive researched the whole time this was posted,ive been doing nothing but research since i started this endevor.ive posted many questions on this web site all with the same result, 100 people look noone answers.After that many people noone knows anything?
No you arent required to help but as common as this problem was( a calcium and magnesium def.)somone would know something especially since i said i use R/O water.R/O water has nothing in it so i need to add it myself.Do you know how i figured it out?from a man i met at a store that had never seen my plants.I explained real brief(less than the info i gave here) and before i was finished talking he was telling me how to fix it.
He also told me these online sites are full of wannabees(no offence figtree as you were actually right on)but most every one here acts like they know alot, but as i said before if its not a simple ph question or ventilation or a journal of some kind,most of them dont know shit.and then there retaliation is "well do your research before you ask a question"its a big fuck you circle.my research on every problem ive had comes up with always more than one possible answer,but only one is right.
i posed this same question many times on this site over a period of three grows.ive tried asking the same question in different ways.ive written to a T what my setup consists of ive included pics. ive done everything short of having someone to actually see it
BTW my plants are alive, i got fed up and started to rant and said fuck it there all dead.there needs to be more people like you figtree, even if you would have been wrong you attempted to answer,thats all i ask

my babies are quite fine