Manhattan Project 2

So the last couple of weeks have been pretty testing. My once beautiful 8 plant grow has now become somewhat of a mixed bag. One hydro plant has had to be removed due to it wilting. The one in the back right is also now suffering the same fate. The 2 in the All Mix are slow but steady.....ish. The front right and back left are nice and bushy and the centre left is large but getting leggy. Front left is a lot shorter and starting to show signs of yellowing to the leaves. Ph is perfect all round. Additional nitrogen has been added. I can only attribute the loss/damage/inconsistencies to the fact that when I flipped them I forgot to change to 12/12 from 18/6.