Plants are drooping at around 11pm every night. In the morning they look better, then they droop again.

What is your experience level? (first timer, novice, experienced...) Novice

What type of hydro set-up are you running? Top feed, hydroton

Your Equipment:
A) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) 1000w HPS
B) Distance from tops? 20"
C) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)Enclosed w/ glass
D) What are the bulb wattages, kelvin ratings, and schedule?1000w, 18/6
E) Is there a consistent fresh air supply?Yes
F) Do you have an exhaust fan and a circulation fan?Yes
G) Size of reservoir?30 gal
H) What medium if applicable. Hydroton w Rapid Rooters

Your nutrients and water:
I) If using rockwoll for clones or seedlings, did you rinse the cubes well, with properly ph'd water?
J) Source of water. (tap or filtered) What's it's ph? RO water 7.0
K) Specific brand and N-P-K ratio for each bottle. List dosages quantity per gallon) and current feeding schedule. Advanced Nutrients 3-Part GMB, Cal-Mag Plus, Plant success Mycorrhiza w/beneficial bacteria. 4x15min
L) What is the ec/ppm of your unadjusted tap (or filtered) water? 17ppm
M) What is the ec/ppm of your nutrient solution?400ppm
N) What is the temperature of your nutrient solution? (reservoir high and low temps)64f-70f
O) Does your ec/ppm show a rise or fall when you do your daily PPM check?Yes, slightly lower
P) Does the ph fluctuate? Yes, for the first few days after a change, it rises from 5.3 to 6.0 after about 8 hours. A week after, its pretty steady 5.3-5.7/8 in 8 hours.
Q) Do you foliar feed? If so, with what, how often, and at what time do you
spray? (Just after lights come on, just before they go out...)No
R) How often do you replace reservoir water/nutes? What does it look like before changes? (clear, foamy, green, brown...)Every week, looks brownish.

Your growroom:
S) What size of closet, room or hut? 8'x6'x8'
T) What are the temps and humidity levels while lights are on? ...With lights off?73-78 lights on, 63-65 lights off
U) Have you seen signs of insects in the growroom? No
V) Are the roots long and white, or brown and slimy?Roots are mostly white, but the parts coming through the bottom of the pots are looking a little dry and brown

Your strain:
W) What strain are you growing? (Indica dominate or Sativa dom?) AK48, random bagseed from quality herb.
X) From seeds or clones? Seed
Y) Is this an autoflower strain? No

Thank you in advance for the help, I've had some quality advice from people on this message board and I dearly appreciate it.
chefbeanstock Reviewed by chefbeanstock on . Plants Drooping, yellowing also Plants are drooping at around 11pm every night. In the morning they look better, then they droop again. What is your experience level? (first timer, novice, experienced...) Novice What type of hydro set-up are you running? Top feed, hydroton Your Equipment: A) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) 1000w HPS B) Distance from tops? 20" C) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)Enclosed w/ glass Rating: 5