Nute burn or deffciency

[wreched75]

Hey guys so I am having an issue here, info below

strain: northern llights
media: coco
temps: 75-80
humidity: 45-50
nutes:GH 3part, liquid karma, hygrozyme, super thrive, bio roots, and cal mag
EC: 1.7 @ .5 calculation
Plant age: 7 weeks

 

[greenergrass]

looks like minor nute burn to me what ph are you feeding
im growing in coco myself at the moment
plants were looking sick at the begining but they are doing really well now

 

[Po boy]

looks like nute burn on the older leaves:the new growth looks fine.

 

[wreched75]

Hey guys the ph is @5.6-5.7 just for swings.

 

[greenergrass]

may be a little on the low side
i water at 5.8 in coco my runoff is at 6.3
i tried bringing the runnoff down to 5.8 by watering with 5.6 and i dont think they liked that