Plant troubles... whats happening?

[MarkusMcNugen]

When my two sweet bud plants started flowering the leaves around the buds thinned out quite a bit and started folding on themselves around the vein of the leaf. I couldnt find anywhere that talks about the leaves folding on themselves. The leaf tips are starting to turn yellow and some of the lower fan leaves started to turn yellow and die. After every watering the yellow leaves seem to make a slow comeback and turn a little green and then they take a turn for the worst and just die. Take a look at some of the photos to see what I mean.

Information -
Medium: Soil
Lightage: Two 250w HPS lights that equal 50000 Lumens on 12/12 cycle
Water: One quart of water until the soil is dry, and then rewatered
PH rating: The PH of the water is about 8 but Ive been using ph tablets most of the time
Nutrients: 10-10-10 Slow Releases Miracle Gro
Size: 5 Plants in a roughly 8 x 4 closet
Age: The two troubled plants are about 3 weeks into flowering

Thanks for any help guys

- Markus McNugen

[Anony]

Well right off the bat I can tell you they are proly root bound. Plants that tall should be in bucket sized containers.
Also looks like youve done some over/under watering.
What are you temp/humidity and pH levels?
Do you have any ventilation?
Any sort of nute that is time release can be difficult as it doesnt allow you to control it.

[urgr8estfear]

I'll put my money on underwatering any day in this situation.
Those pots are too small to hold sufficient water for such big plants, not even for a single day.
Your leaves are shrivelling by drought.

So get bigger pots for those tall bitches!