One plant shows necrotic leaves from bottom. She i...

Hi @cloudsmith88 going off the pictures alone you have a clear Potassium(mobile) deficiency causing your leaf edge Chlorosis(yellowing) as well as a Phosphorus deficiency(also mobile) causing those brown necrosis marks. Plants have 2 types of nutrients called mobile and immobile nutrients. Immobile nutrients CANT be moved around the plant and due to this the symptoms show directly growth where the deficiency is active. The other type of nutrient is Mobile. Mobile nutrients can be pulled from the lower leaves to be given to the newer growth up top as a survival method so they show symptoms on the bottom side of the plant first. This is why your deficiencies are showing on the fans leaves/middle growth and not at the top new growth. To fix this situation you will want to increase your Potassium (P) and Phosphorus (P). Your plant DOESN'T show signs of PH fluctuations which displays as Chrlorosis turning into Necrosis on the same leafs so you are fine there. You could however drop the PH a tiny bit for a few days so they can have better access to more (P) and (P)! 😎 Feel free to look up Images of Potassium deficiency in weed to confirm this diagnosis! Best of luck

Hello ! On the picture before the last one I can see some brown stripes on your leaf , it can makes once think about a PH burn but it is a fungus called Erwinia carotovora ( Google it to understand ) , to treat you will need a anti fungus. When I take a look at the edge of your leaves and at the leaves tips I can recognize 2 symptoms of a Potassium (P) deficiency on a early stage combined with your dark green foliage makes me think that you experienced a Nitrogen excess earlier ( way before your P def ). To get rid of your P deficiency and your N excess I would low my N input and use a PK boost to have a better P distribution. That said I can also see that you have a plant with weird leaves , I would bet in a Bug like roots aphids or Fungus gnats , they can makes you plant grow like that and once they are settled it is hard to make them move : maybe you should consider throwing that one 😓. Last thing, to me you have NO PH related issue but you should low you PH level to 6.5 for better results ( between 6 and 6.5 ). I hope it will help you 😁✌️🏼

the leaves show textbook magnesium deficiency from the flower stretch and the burnt tips from over feeding... you're doing everything right actually, just maybe up the micro, you can t really over do it on micro so don t worry. this plant should recover in time maybe 5-6 days max. Just keep doing what youre doing man. 🚀