cali med grow! wtf is wrong with these!? 1000w flood table

These are 12 blue berry skunk
1000W - 1 400 w - 1 600 w cool tube.
rockwool cubes
hydrotron
ph - 5.8-6.0
temps - they vary the last day it has been about almost 90%
I have been flooding the table 3 times a day for 15 mins after this i just switched to 12,3,6,9...so 8 times a day for a half hour.
ppms..900-1000
I am using the whole advanced nutrients line with the 3 part system micro grow and bloom
40 gal rez

previous to this trouble we were only filling the rez to 25 gallons and during the hot day it flooded and they drank water and the level dropped it flooded a few times with a low amount of water with the ppms at about 1400..might be nute burn not sure ..after this problem i also backed the lights off. I need second opinions.. the leaves are bowings the leaves feel texturized and dry..some little brown spots with some yellowing..i hope they are not fucked..here are some pics if you need any additional information to determine the problem ask away! they are for surely not healthy! Help me please!

I would say you have a mold problem.

gotcronic said:

I would say you have a mold problem.

Click to expand...

Nah you're kidding right?

i think mag def. i've been looking into it because my plants had the same symptoms at the same time. I'm not an expert but i added mag with epson salts in a spray bottle and it solved the prob. you apperently are supposed to add epson salts to your nute solution about every 3 weeks. Not positive though. the mag def alot of the times comes with calcium def i've heard. but the spray worked well. also my plants started to grow again as if nothing happened. just asted 2 days. good luck