Slight droop, DO? Low Humidity? High ppm? New setup, with pictures. Ebb n Gro.

This is my first attempt at hydro and this many plants in general and I cannot seem to figure out why the leaves are not as perky as they should be. This one above is very healthy and still seems to have a bit of the droops

Tent temperature fluctuates between 74 and 80 (at canopy), a portable AC resides in the room with the tent and is aimed through a zippered hole. The 425 cfm fan pulls through a scrubber and cools the light, however the warm air just gets blasted at the ceiling(outside but above the tent) I know it should be vented elsewhere but that is a problem I cannot tackle immediately.

1k HPS is approx 24 inches away from most plants still, they were under t5's previously....slowly moving it down. Is it too far away?

Medium is 'Rocks', something like hydroton but more surface area.

Rez temp is at 20 C, ppm is 1600 right now (was 1750 previously, but noticed a slight burn at the tip ) I have been raising the ppm slowly, and running into deficiencies the entire process. ( N, and then Mag; you may notice some lower leaves with some old damage)

Using Humboldt 3 part, with Cal-Mag and Hygrozyme. I skipped the hygrozyme this last water change and added some 3% h2o2, to see if they would respond. Wasn't sure if it was a root problem, I really don't want to sacrifice one to the cause. The clones I did eventually dig up and found very white but stunted roots. Something with me and the rockwool probably. The rest of the plants were seeds started in rockwool.

There is no air pump for the rez, the plants get watered every 3 hours for 15 minutes. Is it a dissolved oxygen problem? I will add an air pump asap either way, this weekend.

pH was at 5.5 for a few weeks, now keeping it at 5.8

Once the cold weather(outside) crept up the humidity around here dropped, and I had to add a cool mist humidifier just to keep it at 40%. Is my humidity too low?

The two in the middle are from my first rockwool cloning attempt, and their root systems are weak. So disregard their crappiness, unless you think it relevant.

Sorry for the long ass post, I want to maximize your ability to help me. Thanks in advance.

Looks like some shock of re location, going from a fluro to a blazing 1000 watter. Wait a few days it will perk up as it adjusts. Also get some 35% or 50% grade h202, the 3% stuff is too weak unless u got gallons of it.

Thanks for your response, however I should have noted it has been about 14 days under the 1k. Another thing I somehow neglected to mention is that they are on an 18/6 light schedule I was planning on flowering sooner, but their overall health has side tracked me a bit. Under the t5's they had 24 hour light.

Thanks for the tip on the h2O2, anything else you can think of? I appreciate it.

So today I gave them a flush with some pH'd tap water @ 140 ppm. After 3 flush's the ppm was nearly 300 and the pH went up each time also. ( I kept downing it, and recording the ppm)

Took the ppm down from 1600 to 1400.

Not sure what else to try. I flipped the light schedule to 12/12.

Anyone else have anything I should try? Is it possible those leaves may never stand up properly? (Did I do some permanent damage along the way?)

Like i said in about a week it will bounce back, dont feed or overwater for a week.