Struggling with nutrient issues (PICS)

I have a really old momma (3months) I used to clone that I am trying to get ready to flower. The soil is buildasoil living soil 3.0
I’ve been adding 5ml of cal mag per gallon and use about 1/3-1/2 every time I water. The light is a 630 cmh. I just transplanted to a 7 gal pot about a month ago. I water with ph of 6-6.5. Hopefully y’all can help me out. I really wanna flower soon but I need to get this crap under control first.
 

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Tbh
Get you some ocean forest... It's a lil hot.... So you have to really water in increments and graduate slowly to larger feedings but this won't be an issue

Imho
 
I understand your sentiment but it looks like you have a few things going on besides nite burn but I say it may just be the soil itself

Maybe you can try some with one plant and compare

Doesn't hurt to test

Hope everything pans out for you
 
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