Starting back in the swing of things but need help

Good after noon everyone I recent started back cultivating (well trying) all has been great so far until switching to flower. Just fed my soil (ffof in 2 and ft strawberry fields in the other 2) with teas and great white. Now I'm a good way into flower and had these problems come up. Wondering it anybody has any input? Happened to me before with my first attempt using coco if that helps.


Under a dimmable 1000 hps in 2.5 gallon square pots temps are 74-77 lights on 65-68 lights off

They look burnt but could you supply more info?
How old are the plants, what type of soul are you using, had you upotted recently, what concentrations did you feed at? Are you ph'ing your water? Tap or RO?

Don't know what it is, started awhile ago right. Note: helpers note the 1st picture the lower front branch, you can see the green leaves turning yellow from the front to the back of the leaf. Looks kinda like the early stages of what happened to the other leaves IDK.

What ppm did you feed? Do you ph?