Plant almost dead

Looks like heat stress or overwatering. Does the water drain from the bottom? PH is important but not sure that mishap is the problem.

I changed position of the plant, and light wasn't up the plant but really close , temper is ok, humidity as well, i m trying flushing with just water with a ph 6,3 and let see

Hey... almost looks like a plant damping off. You could try sprinkling a little bit of cinnamon on the soil and then water it in. If its damping off this will help

Hope you have PURE water flushed because something in that pot is very bad juju that is not a PH problem Heat can do that Cold can do that Toxins can do that PH cannot that quickly I would begin with a 100% flush then let things dry out see what you have remaining. Would also do something untoward with the Bio-Bizz but thats just the opinion of grouchy old fart. Good luck

Hello.. Hope you are well.. Do u own a cat.. Our cat took a piss in the pot once n it looked like that in a couple of hrs!!.. All other plants ok?.. Im assuming she's not just dryed out over nite.. Mite of been ur ph but ive got her this far on ur way its unlikely.. Unless uve had a stoned moment (it happens to us all tbh) and put more feed in than uve realise (double dosing).. Other than that its a mystery.. Stay safe n gud luck with her.. 👍🍀

did you increase light or any changes related? heat? That looks like it's cowering from the light. otherwise what is responsible for stem strength? Ca and Silica can help? google that, lol... doesn't mean you want to load up with it.. just a normal amount in a good feed should be enough..

What's your temp looks like heat stress or root damage.