Root problem?

Yes, they are drowned. Are they sitting in saucers of water for extended periods of time? If so, this is a no-no. Inddors it is probably best to water in the morning to avoid excess humidity problems at night, as evidenced by the black spots (fungus) on some leaves.. It seems this problem is a recurring theme in your questions.......please start a diary so we can all help with more specific advice......we all want you to succeeed, not get disheartened........but a couple of pictures of funny leaves is nowhere near enough to go on for targeted advice, matched to your issues.

When plants stop drinking ph is out of line a lot of times. In your case you may have root rot started. If run off has a foul smell then you have rot problems from being too wet and ph off. Pretty simple diagnosis without a diary.

Hey Growmie, watering a light out is not going to give you optimal growth. The best time to water is about 1 hour after lights come on, by this time the stomata have opened and are transpiring, and are looking for all those nutrients. When they are in dark, the stomata close and uptake will not be optimal. Just my opinion, Good Luck Growmie 🇨🇦👊❤️

Oh, if only people would actually read the question posed instead of just giving the answer-of-the-day... Here's the thing - you don't have a diary and so all we know is what you've told us in your question - and you may not be looking in the right place - i.e., you THINK it's because you water after lights out... I would be worried about the pH level... this is definitely a case of calcium deficiency but just throwing calmag at it may not help... And if your plant isn't drinking, then flushing it would probably drown the poor thing... I'd be willing to bet my very last dollar that your pH is WAY out of whack... if you can get the pH to a range of 6.0-6.5, she should start responding fairly well and start taking up the nutes you are already providing her (i.e., there IS calcium in most nute lines but your plant can't get at it because of the pH)... I would also tell you that, yeah, your practice of watering after lights out is a poor practice... think of it this way - the plants are asleep during lights out... when the lights are on, they're awake and trying to grow which means they need water and food... so water/feed them in the morning (or right after lights ON)... And start a diary... even if you can only put together this one week - if you can go back a week or two with SOME information, that would be even better. That way, when problems/issues/concerns pop up, we have as much information as possible about your grow and can give some rational advice... it helps us help you! Good luck... start measuring pH and start a diary!

Ciao! È una carenza di fosforo e potassio! Ma è causata, a parer mio, da una tossicità per i troppi sali nel terreno. Fai un bel flush al vaso, quando avrà bevuto abbastanza da poter irrigare di nuovo, dalle mezza dose di pk, senza azoto! Troppo azoto impedisce l'assorbimento di pk! :) Happy growing