Stripes on Leaves

[grunt]

Any idea what these stripes could be caused by? Plants are 2 weeks from harvest.
Plants are indoor hyponics
Ph:5.5
PPM 600
water temp 70 F
Room Temp 75 F
Humidity 50 %
Using 2 700w Mars LEDs 18" above plants
Lighting 12 on / 12 off
Help is greatly appreciated.

 

[Tead]

I might want to call that a mag def. Do you supplement mag in any way?
PH is low... that will effect uptake of nutrients... like mag.
5.8 is generally the target PH for hydro.

 

[Vestrimatrik]

Mag deficiency.

 

[sshamish]

Light mag but if you're in the final two weeks just flush it all out, you're already rid of much mag so you're ahead of the game!


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[MyMeds4Me]

Could be Mag could be Boron either or I suspect a deficiency. I would change water, run neutral for 24hrs then drain and run normal nutes according to time frame.

 

[Perfect Sun LED]

Looks like mag and/or potassium issues, often caused by PH not being stable in your medium. Also if the roots are too cold, it can cause an uptake issue.