What is going on here?

thanks for your help guys. sorry I was busy doing other stuff for a couple of days. I applied your feedback and corrected the conditions. I also updated the nutrient section in that diary. Today harvested the other plants & the new ones could move to the bigger tent. I will continue to give them 18/6 of light a day for a couple of days & then decide if I can switch to 12/12 coming week I dunno.

Hi MCC I see that the leaves are claw-shaped looking down at the ground. I think it is due to excess nitrogen. In the growth phase and in the case of a small over-fertilization when an excess of this element is suffered, we will proceed to reduce or eliminate the growth fertilizer during a few waterings. If additives are being used for the plant, these can continue to be added in a regular way since they do not contain food, only elements that will allow the plant to metabolize excess food, creating more leaves, branches ... in short, they grow and use up the nutrients that contain.

And also, I beg of You to let them sleep 6 hours. No good comes from a 24h schedule, and is a bust if ongoing.

Well first, in your diary there no list of the nutes you use, so don´t know if its nute burn or how the substrate´s microbial flora is. Then, depending on intensity, your lights could be too close (the ones with bleached tips if I decerned correctly from picture). Humidity should be at this stage 60%. Last but not least, the crumbled - brown spotted ones might have a root infectation, so keep close eye the next days. And search further on hydroponics way of growing, intel is better then no intel ;-)

None of these is a real problem. The brown has been caused by the leaf hitting the tent when the fan is blowing on the leaf. The green tips is absolutely nothing to be concerned over. The twisted leaves occur from time to time and are also of no concern. The only concerning thing is the 24/0 light schedule. Buy another timer, even a cheap one or switch the lights off manually, it's not hard to do. 18/6 is optimum and trying to grow plants without any "sleep" for weeks/months will lead to big problems. Nothing on planet Earth can function normally without "sleep". Do your plants a favour and rescue them from this totally abnormal condition of continuous "awake" time, before they are completely exhausted and have completely imbalanced hormones, which could lead to all sorts of real problems eventually. Hope this helps,........ Organoman.

Thank you for your answers. pH & roots are checked & fine. I checked other conditions & RH is 30%, LED light is 24/0. Maybe that is what is making life hard for them. But right now I can't change it. Vegetation Tent is in same room as Flower tent & the other plants are in late flower so I want to keep RH low + I don't have a spare clock timer so the lights are just switched on. Gotta keep thinking how to solve that suboptimal situation.

Looks like ph fluctuations. If not check your roots for rot.

Hi mate, looks like heat stress and maybe a little ph fluctuation... Check all the usual and check your VPD value...Hope this helps, good luck and happy growing