HELP: NFT droopy leaves

hi riu community!

i'm currently running a nft system for my first time and now i got a couple of plants with droopy leaves i've only used dwc-buckets up to now. they don't seem to be coming as nice as in the dwc-buckets!

what am i doing wrong? please help

### my data ###

strain: sensi seeds - skunk #1
ec: 0.8mS
ph: 5.8
room temp: 70 degrees
water temp: 65 degrees
humidity: 35%




need any more info? or more pictures? just tell me

invaild attachment is what i got when try to look at the pic

fixed the image! i hope it works now

bump

Raise the light.

I see nute burn

thanks for the replies.

nute burn:
i've been trying to lower my ec during my last couple of days. the color of the leaves seem to be getting healthier again.

raise light:
i've thought about this one too. i think i can exclude this because only the plants farest away from the lamp show the "sloppy, droopy" signs -.- any counter arguments?