plant problems HELPPPPPP!!!!!!

hi guys im from the uk wondering if anybody can help me jst put my 12week physcosis into flower and most of the leaves have turned a yellow colour and some of the middle leaves have brown like burn marks on thm i have look on many of dignosis sites and it looks like a range of things and im lost i have attached some pics if this might help. jst to help further they have jst went into the 5 week 1st week of flower. cheers

What's your nutrient schedule? They look a little burned to me.

my nutrient scheduel is 3 feeds then up weather it be every 2 days jst whn there dry enough to feed have been trying not to over water or feed thm have jst switched to ionic bloom and they have jst had 1 feed with 2ml bloom then i noticed they started to go a bit yellow. i read the self diagnosis thread on here and thought it could be a number of things from the thread and didnt know wht to do i have jst gave them a flush out incase it was a nutrient build up.Need to wait and see over the nxt few days see if they improve wht u think ???

Like you said, nothing to do but wait it out.

flush always helps with water and h2o2

cheers guys let use knw how i get on

hi guys just to let u knw looking vvvv good agin think it was jst a nutrient build up think the flush has helped