Looks good try to get an indica for indoor growing and run a sea of green on a perpetual grow.
https://www.rollitup.org/t/get-a-harvest-every-2-weeks.6592/
If you know you soil mix it works its ok. For beginners and experienced you cant beat coco, as i said green leaves top to bottom start to finish .I dont think you can do that in soil indoor.
Crap medium causing salt build up in turn the yellowing. When too much builds up the plant cant take up N. Also in these soil mediums the ph is usually out and stays that way all the way thru. Use good coco or hydro mediums so you control what happens in the medium.
Bro you got all the bells and whistles , nice set up with the avengers. All this and you use cheap medium. Coco coir is no good you need a professional coco mix designed for growing dope. Those blocks are about $4, the bag of Terra is $40. Everything else is great.
just use coco and good hydro nutes. I use them and never have to adjust the ph and i get all green leaves. With soil mixes ,potting mix etc the ph and salt build up is not good for growing.
You can still use the led as a good veg light for young plants. Dont worry about the nute burn , with the burnt tips your just crossing over the line slightly so at least you know they are getting enough.
Smoke the small one and hope the droopy one comes back. I doubt it will though ,when you dig an est dope plant out of the ground to transplant it rarely recovers.
H2O2 wont work. Its in trouble if the main stem base is rotten ,this cuts off its water and nute supply. Clear around the rot ,soil, foliage, weeds etc. Let morning sun shine on the base (if its outside) run a fan on the rot 24/7 if inside and pray it still lives.
Where are they? outdoor in a hole or pot in the bush, in your yard? Clean that grass and weeds up that are leaching much needed food from the soil and feed more N .