FINNALY!!! My troubleshooting form is filled!!! HELP!

S=Traditional Soil
E-indoor
E-Soil
E-Plain Soil Mix
CSL-Soil with Wormcasts (18%) + 80 soil + 2% rice
E-Tapwater
E-6.9 Water pH
HRT-Source water EC (if hydro)
E-2.5 months
E-No fertilizer, yet. I used some N while they were vegging
E-250W HPS 22cmts
E-22C-28C
E-60% humidity
E-12/12 photoperiod
E-BIG window
E-Earth pH is 6.5

This is it. I got the pH meter and got this awesome number. 6.5pH. I knew it wasnt that :P . NOW here comes the update.
I placed on the suffering plant a 10-50-10 fertilizer today, so that i give her the P she needs while she is flowering. Do you believe this is a SEVER P defficiency?
It is slowly happening to the other flowering-chiks, so i believe it might be P.
I am just amazed of HOW fast this nute-defficiency burns the plant. Its just impessive. It took 3 days and the chic became TOTALLY dry.

I will place the pics again.

This one is from a leaf from a starting-to-get-sick plant
http://i44.tinypic.com/op8s4k.jpg

This one is from a plant that has been totally attacked by the sickness.(took 3 days to become like this so i have to act FAST)
http://i41.tinypic.com/2i2315k.jpg

I added the ferlizer to the 3 plants. One of them is burned(pic 2) one of them is slowly having the lower leaves burned out(pic 1) and another one is having a N defficiency, but its normal cause she is in her 6th week.

Thanks for your quick answer.
Peace

You know I was growing some Tomato plants outdoors once and they had the same problem you do. Found out our tap water is really hard. Might want to check your Alkaline levels in your tap water.

I have no idea what it could be.

Looks like over fert if anything. Cause I over ferted a plant (I thought) and she looked like yours eventually.

Maybe water has some nutes that burned them?Calcium etc...
I found this link on wikipedia. It says: lower leaves show signs of P deff BEFORE the rest of the plant, and thats exactly what happened to them. Still i need to know whats wrong :P
Phosphorus deficiency - Wikipedia, the free encyclopedia

GOD i wish i were an agronomist sometimes...

Another 5th week plant is being attacked!!!
This is the pic
http://i42.tinypic.com/2khsh1.jpg

The leaves get very thin and soon dry out like the other plants i showed in pics before. The 10-50-10 that i added 3 days ago doesnt seem to stop the sickness :S

Should i flush? PLEASE help me!!! As you can see there are some marvelous flowers that i might lose if i dont fix this problem...
Can this be an humidity problem?(i might have a broken humidity-meter)
N defficiency?
P defficiency?
Nute burn?
HELP!!!

Sounds like over fert. I've burned up more than one with a 10-52-10 Schultz. I found out you should only give that stuff 2-3 during the whole flowering cycle and use 1/2 strength or 1/4 strength.

Looks like over fert too. Leaves curling under, drying up fast, crunchy. Deficiencies won't kill a plant this fast. Pretty sure you burned them up.

The plant in the first post looks too far gone. Pretty much completely dead. Next grow, I would get some better soil, because when you say "soil" is it just soil from outside? Or is a peat mix, store bought? Use nutes with caution, better to under do it than over do it.

Wish I could help more, but the only time i seen a plant look like yours was with over fert.

Well ive only fert ONCE 3 days ago. The problem started BEFORE i used fert. Soil is a soil mix.80% soil 18% wormcasts 2%rice. Maybe soil is toooo rich and burned them?

Can i flush so extra nutes go out of the pot? And if so...HOW?

What kind of soil? Just outside, from the ground, regular soil?

i bought it. Its some regular mix. No perlite or anything in it. Flushing option?