Yes let the container dry out all the way and test it by picking it up. Night time temps need to be at least minus 10 degrees from your lights on temps at the planter level because I want the planter to remain at 68F to keep root rot away now that you over watered. People think that root rot is the end of life for a plant but honestly it can't even keep up with marijuana if you keep a low night time temp and you are allowing the planter to dry out completely. You know those plants that grow in the cracks on the sidewalk? Marijuana is that tough but it needs a little help from you.
Your plants are hungry like Olive mentioned and actually I think that is caused by a problem in the root zone although 1/3 nutrients might have been a little light. I can't advise you to feed them stronger without knowing what nutrients? I might suggest that you use a wetting agent and foliage feed them which usually I don't recommend a wetting agent but your leafs are in trouble. A wetting agent allows the nutrients to stick to and be absorbed by the leaf.
Actually I am worried to give you advise because I am not used to dealing with a plant that is in this bad of shape, this much dirt and also pushing temps to the maximum also. The best advice I can think of is lower the temperature, roll the lights back some, lightly foliage feed them with a wetting agent such as wet betty and let her recover. I don't think 1400 total watts is needed for that plant when it is full grown let alone 1000/2=500 watts for 12 hours then an additional 400 more watts for 4 more hours?? I think a 23w 6500k daylight cfl bulb would be perfect and especially helpful with the recover. (I mean turn off that 1400 watts and replace it with 23 total watts of bulb)
I CAN'T UNDERSTAND YOUR LIGHTS HOURS! I guess you are saying 500w HPS of light for ????? many hours then you're adding an additional 400w of MH for 4 more hours? The smallest footprint of a 1000 watt HPS lamp is 3 feet by 3 feet and that is wasteful you should be building a 4x4 plant for that 1000 watt lamp. I dunno, I am really disorganized now because you are giving me bits and pieces of info and I am an old stoner bro.
edit: couple edits