growing

I just switch the plants over to flower about 8 days ago, some time last week ( a few days ago) one of the plants looked over watered.

I thought it might be because of high ppm( around 1200 / 1300 - my ro system broke and ordered a new one)..so I was 2 days late on changing the water.

The plant went from looking health and good to looking sick in no time at all ( over night basically)The plant looks over water or under water - it looks weepy  ( you can see in the pictures).

The strange thing is that the other plants around this plant look fine. It is just this one. However I want to stop whatever happened, because it is looks like it is about to start on another plant.

Didn't take pics of the roots, if you want to see the roots let me know

Here is some basic information.
1) Type and wattage of lights. ( 2 x1000 ( hortilix mh and one hid)
2) Distance from tops? ( around 2 feet with air cooled hoods)
3) Reflector type? (cool tube set-up, )
4) Is there a consistent fresh air supply? ( co2 is added to the room
5) Do you have an exhaust fan and a circulation fan? ( yes)
6)  schedule? ( 12 on / 12 off)
7) Specific brand and type of soil, (hydroton )
8) Size of container. ( ebb and grow 2 or 2.5 gallon containters)
9) Did you use peat pucks  ( rapid rooter)
10) Source of water? ( RO water, ph around 7.2)..
11) Method of checking water ph. (tri meter and also test strips)
12) Method of adjusting water ph. (gh ph up and ph down)
13) Specific brand and N-P-K ratio for each bottle. List dosages ( gh schudle @ 3/4 strength + cal-mag + magnum +  hygrozyme  ) and current feeding schedule.
14) How often are you watering between feedings, and how much per watering? ( the ebb and grow is watering ever 4 hours when the lights are on - one time when the lights are off)
15) Any additives or tea's? ( bud blood last week.. cal mag and mag.)
16) Are your ph levels stable, or do they fluctuate? ( they slowly rise)
17) What is your ingoing water's ph? ..( i keep the water for 7 days than flush it)
18) Do you foliar feed?  ( one in a while but not often)Your growroom:
19) Indoors or outdoors? ( indoor)
20) What size of closet, room or hut? ( 10x11)21) What are the temps and humidity levels while lights are on? ...With lights off? ( on 85 degree @ 20% rh - lights off around 75 degrees with 25% rh)
21) Have you seen signs of insects in the growroom? ( spider mites, but not for a few weeks)
22) What strain are you growing? (Indica dominate  )
24) From seeds or clones? ( clones)