i need some help plants dying

ok here are some pics la. conf in left corner nl right . bttm corners are haze. now they are dying somehow and i noticed it yesterday. i think i know why they are being soo droopy now that im in panic mode. the reservoir is about 7 gallons. and i had to add 2 teaspoons of concentrated ph down to stablize it.temps are i would say 80-88 and it gets humid in there. but i have been fixing the situation of heat and humidity cause i know how bad they are and now this shit happens.
i had to change the water. same nutrients just a little stronger 10ml added to each nute. im using advance nutrients cataclysm and a bit of pk 13/14 to make up for not having foxfarm bigbloom this time. i have tigerbloom though. also i add malassas and a little superthrive when things look like they need to cheerup. i stopped adding cal-mag plus cause it was burning the plants in veg and flowering. the liquid karma though i never had trouble with soil plants is turning the roots brown and they are shrinking. used the rooting hormone from advance nutrients and was great but once liquidkarma came they stopped growing out. i put it 7 gallons but use only nutrients as if it were 5. thats why i added a little extra pk 13/14. there is a fan going constantly and it gets new air every few hours. they are in plastic tubs and thought that the light might be killing them*who knows* so i covered the tops of them with mylar.

so thats about everything i really REALLY dont want my L.A confidential to die. thats the only strain i actually put money into besides some diesel i had before but seeds are gone. only one of the 10 turned out to be female and i thought that she was actually a dude until a 2 days ago when the first pestils came out.
I know my stuff with pot now but i really dont wanna risk losing her. the rest can die cause i can clone em not too worried but not her. stinky get my back!!!!

oh and i know there are lots of nutrient guides out there for selecting the right ones but i dont really like foxfarms stuff. i mean it did great in soil but.....something different now they are... smaller. i hope to get some bloombastic soon. just anything i could add to my regiment you know to fill em out

The best thing to do is fill in Stinkyattics troubleshooting form at the bottom of my post:thumbsup:
Good luck.

looking at the condition of some of those plants i'd say its too late :( but from the pics it 'looks' like a lack of or too much of water or heat. not always easy to tell from a pic though. i wish you all the best of luck

I'd go back to soil next grow. Don't go with hydro unless you understand what to do, have a ph/ppm meter and know what you're doing. Soil makes for an easier grow.

Looks like you could have got the root rot. Also be REAL careful with superthrive; more than a drop a gallon can actually HURT your plants.