Can some please help identify these problems?

[ab2t2000]

I’m in auto pots and been following a light feed chart my temps are 25c-26c day and 18-21 night my rh is 50 all the time maybe 60 at nights I’m using leds at 40cm on 80% ec is same in res as pot also 1.5-1.6 ec This is my 3rd run with my nutrients and this keeps happening
Turning yellow and red with slow growth
What deficiency can this be?

 

[MickFoster]

What is your medium?

 

[ab2t2000]

What is your medium?

I’m using auto pots with 70/30 coco perlite but I have pebbles at the bottom so I think it’s classed as a hydro

 

[ab2t2000]

Is it nitrogen?

 

[MickFoster]

What nutes are you using and what is your feeding schedule?
What is your pH?
Are you feeding to substantial run off?
Do you ever use plain water?

 

[ab2t2000]

What nutes are you using and what is your feeding schedule?
What is your pH?
Are you feeding to substantial run off?
Do you ever use plain water?

No run of bottom feeding I’m using idrolab premium
Ec1.5-1.6
Ph 5.8-6.0
Ignore the purple that was light stress 1-2 weeks ago but now there yellowing with a reddish discolouration at the bottom up
No brown spots or any drooping just yellowing w reddish discolouration and really slow growth there drinking around 200L every 2-3 days in 15l pots there’s 24

 

[MickFoster]

I recommend you start feeding from the top at least once a day to run off.