I think im going to ask you as if we are starting from scratch
how often do you water?
how much water are you putting thru each pot every time you water
do you need to ph adjust? whats the ph of your source water and how much ph down are you adding per gallons?
are the light on in those pics or are they off... take pics with grow lights on and flash on
the purple does look like P def
tell me how your mixing your nutes again, how many mls per gallon
whats the ph of the watering solution and the ph of the waste water that comes from the bottom of the pot
whats the EC/PPM of the solution your mixing
I have to say your plants aren't looking better... theyre looking worse