Need help!! Hydro (pics inside)

here are them after 2wks flowering like 3rd day into 3rd wk

and this is last night just 2days later after i upped my ppm i think im going into my 4th week strong set my ppm at 1800 2days ago check 2day its at 1225 ph was up at 6.2 so i lowered back to 5.8 got a new ph meter and things been greener plus i raised lights up they were too close

Looking better. Remember, the damaged leaves will not heal.

thanx dude i kinda figured they wouldn't come back

here i am 30 days flowering what do you think