leaf symptoms

This is what it will look like late stage growdiaries.com/grow-questions/36946-leaves-dying

Another thing to be aware of is the spots might be a fungus so keep a close eye on it. Leaf septoria, also known as septoria leaf spot or yellow leaf spot, is a plant disease caused by a specific kind of fungus known as Septoria lycopersici.

Looks like a cal-mag deficiency. According to biobizz feeding schedule you should be at .8ml/L at week 8 on. And to treat a deficiency to feed .8-1.2. I would go with a 1.0 next watering then back off to .8 if you see improvements. Happy Growing.

She honestly looks really healthy, those spots look like the start of a calcium deficiency and the slight discoloration on the tips of your leafs are nothing to be concerned about, it's not over fertilized or under yet. Good job tho! I would find a way to supplement calmag