to cut or not to cut?

i need some help guys.
my grow consists of 5 raspberry cough, 5 northern lights, 5 venus fly trap and 10 master kush. they are in week 2 of flowering. all from feminized seeds from nirvanna. 2x 400W hps and 1x600W hps, soil grow in 10 liter pots.
the master kush plants never really developed well. they have had some severe curling (claw) and slow to no growth. (i have ruled out PH, moisture, and over watering!!) all the others are doing grate under the same exact conditions! i had a grow once go bad on me due to a hermie and i am debating if i should cut the master kush plants down just to be safe...

have you ever received a batch of seeds that went bad like that? all the plants are in the same room with the same conditions exactly but only the master kush is doing that. can it be defective seeds?

here are some pics of the master kush:



what should i do? cut them or not?

thanks....

what are they planted in? and what do you feed them?

they are in potting soil (locally sold commercial stuff of good quality) with puffed clay @70-30% mix. they are fed a 3 part GHE nutrient formula slowly increased and now at 100 percent strength. all the plants are in the same soil and receiving the same nutrients but only the master kush is like that!

p.s. i have grown master kush once before under similar conditions and it came out perfect.

it looks like your feeding them to much try plain water only for a week or two, and let the medium dry completely before watering again.