New grower wanting feedback/advice on current setup <3

Hey all I noticed some spots coming on the lowest leaf on one of the plants today. Does anyone know what this is, could it be leaf septoria? and should I remove it quickly if so? I think otherwise the plant looks pretty healthy so far.

I wouldn't worry about it.

Septoria has very distinctive "bullseye" spots of necrosis; thankfully, that ain't it.

Hi guys, I have a problem with one of my plants, I am wondering if anyone can shed any light on my situation.

It started with some yellow spots on one big fan leaf which progressed to browness and it turning crispy, I cut it off, this is now starting on three of the other fan leaves - the big ones at different stages of disease. The other big fan leaves are now all curling down and have brown patches. The branches as seen in the pics are also arching downwards. I have no idea what's causing it, it's such a sad moment! I was using a little plain vinegar to bring the PH from 7.5 to 6.5 for a while, but Im not bothering to PH now knowing that it is not necessary in all organic grows.

All other protocols have been followed from what i can tell - gradually increasing nutes and being cautious (Im still going fairly cautiously with Nutes). I was probably underwatering for a while but I have since rectified that. Water has been left to sit for 24 hours to dechlorinate. Temperatures and humidity have been continually optimal. As has airflow and CO2. Where do I go from here? Today I watered about 1500ml after 3 days, maybe the watering constitutes some of the heavy clawing down if it was too much water, there was a fair bit of run off.

Maybe try watering slowly. Dry media can actually repel water at first. Watering too fast can channel through the pot and contribute to excessive runoff and washing away nutes while leaving dry spots in the pot. Just recently been using organic dry fertilizer here with good results but I'm still PHing to around 6.5. I've had those spots and patches before and best I can tell probably some calcium/magnesium lack. Others here are more knowledgeable than me.The damaged leaves won't green back up though.

Fishmon said:

Maybe try watering slowly. Dry media can actually repel water at first. Watering too fast can channel through the pot and contribute to excessive runoff and washing away nutes while leaving dry spots in the pot. Just recently been using organic dry fertilizer here with good results but I'm still PHing to around 6.5. I've had those spots and patches before and best I can tell probably some calcium/magnesium lack. Others here are more knowledgeable than me.The damaged leaves won't green back up though.

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Thanks for your comments, I got some Epsom Salts today, think I will add about an eigth of a teaspoon, I also made some calcium solution from eggshells and vinager. Impossible to know how to dose so will try a several drops of the calcium also. Maybe. that helps Trial and error is how we learn i guess, sometimes the hard way. If it first one doesn't success, try and try again! (I could have just bought calmag but didn't want to wait days for delivery!)