Will they survive? Start veg not looking good.

👉Also for anyone, who still wants to help👈 I have updated my diary with detailed information and pictures

@Chow_13, You most likely wont see this, but it deserved an answer and explanation. First of all, thank you. Was not informed Light mix usually has enough feed for 3 weeks. I will keep that in mind. And i will test the EC of run off next time. As i added Co2, i am not currently using my exhaust fan.(usually dont use it, unless it is for dehumidifying) for the exact reason you say, A shut off enviroment. So i made a solution, where i dont exhaust air, but control humidity down(and temp) with slowly blowing cool, low RH% air In my shut off tent. I hope it made sense :)

light mix usually has enough feed for at least 3 weeks. Adding bottles on top of that cause nutrient burn, even if its just root juice. It could also be your light hard to tell. If you don't have an EC/PPM meter then I would recommend getting one. You can test your water in to the runoff water to see if your over feeding. I would recommend not using your CO2 bag in your setup, Your exhaust fan is pulling it all out of the tent rendering it useless. CO2 is to be used in a fully sealed environment and you want to get the PPM's over 1000.

https://www.growweedeasy.com/cannabis-symptoms-pictures

Big thanks to anyone who put their answer. To clarify, they are photoperiods :) Im growing in Biobizz LightMix I only fed one time ( 2/9 with half of the dosage recommeded ) so i they cant be overfed. Always tent Ph before and after nutrients, aiming for 6.3 but happy with anything 6.2-6.4. I am doing my best to get temp down, and to compensate for the stress they have been going through, i have turned down the output of my light by 25% (Lowers the temp as well) I got two fans in the tent. One oscillation fan at the top (not point towards plants but the walls to get the airflow down) And a station fan on low speed, moving the Co2 and airflow upwards. Solution: I will keep the light on 25% until they recover Give them ph balanced water atleast 2 feeds. Keep temp down a steady Stay on point with the VPD (0.6 -0.8 kPa) https://www.dimluxlighting.com/knowledge/blog/vapor-pressure-deficit-the-ultimate-guide-to-vpd/

Never take grow advice from stoners.

Yes you can absolutely bring them back. They don’t appear to be autos so anything’s possible. I’ve come back from worse. You just need to figure out what you’re doing wrong. Looks overfed to me. Or maybe pH off bad. Is this actually soil or a soilless type mix?

Hi, a bit hot for the young one I would say see if you can get your ambient temp down to 22-24 degrees Celsius. If anything this looks underwatered. This can still come back...just check your fundamentals. Airflow, temperature, nutrients, pH, Humidity, VPD etc etc.. get all those in line you should come right. Dont feed right now...just let it recover. I hope that helps. Sticky Buds!