Nice work on posting the whole journal! Its cool to see. I dont see what your EC or ppms are but at the start you EC doesnt need to be above 0.5. I would kill off the struggling plants they are just going to attract bugs. It looks like you are topping them which is good. Make sure the pot is drying all the way out, you dont want a wet bottom which it kinda looks like from the brown leaves. Remeber LESS is MORE.
I have 1 plant that look almost dead and I have another on the rebound
How long to give the plants
I often have a hard time killing my babies
Also can I reuse the dirt