need a lil help with my chocolate kush

OK I have some chocolate kush 31 days from seed under a 400w MH just hit her with first set of nutes botinicare pure pro grow not sire if this is Ph or nutrition burn any help tips turning yellow

it looks hungry to me, the older growth is yellowing but the new growth is not looking bad so i highly doubt you are over feeding.

you should be looking to transplant to a bigger container pretty soon too.

OK thanks