MORE problems w/ pics. HELP PLEEAASSEEE

i really need some help. I've been reading and reading posts and I'm kinda getting more confused. When I try to narrow a problem down by the troubleshooting pics it seems like I have all of em, jeese!!! This is my first grow and I have a lot to learn! Read the nute forum and really liked it. This may sound stupid but once I realize the problem i'm not sure how to correct it.

Strain: Afghani x NL
Medium: rockwool coverd with clay pellets
Hydro flood and drain 2x/day
Nutes: GH according to bottle (found that was a mistake)
PH: 5.8
Temp/Humid: 74/50-60%
1000w hps

Been flodding with just striaght PH'd distilled water for 2 days don't really see a difference. should i cut dead leaves?

Any help is muchos appreciated!!

In order of problem progression: Last pics are b4 flush

thanks!!!!!!!!

ps- the one that looks like t has zinc def. is a male and has been removed.

Anyone? Bueller, Bueller, Bueller. LOL

it looks like nute burn to me

you are over feeding your plants man-i think
keep up the good work

thanks for your responses! I've been flushing now for 3 days, I'm praying they get better. I'll keep you posted!!! Thanks again!!!

95% of whats pictured looks good. Are you ventilatings your space ???? At the very least you need a small fan blowing air around the bottoms of those babies. Don't let a few fucked BIG OLDER fans stress you out. They (the older ones) start to degrade after awhile. No problem. If its dead or dying take it off. Worry about the new growth not an old workhorse fan leaf.

Hey earlymorn! Thanks for the advice. I have a hydrohut and the humidity during the dark is freakin nuts!!! 80-90. I do have a ventilating fan and when the lights are on it's awesome but when i close up the hut it gets like air tight so i didn't want to vent at night cause i was scared of taking the fresh air out. Now i open one of the holes in the back corner of hut and vent during dark too. it helps a little. This sure is stressfull, thanks again for your help. oh, started them back on nutes but only at 1/3 strength so i don't fry the babes again!!!!!! lol