Help, leaves yellowing from outside in?

Leaves yellowing from outside in what is the problem?

Those plants are STARVING! You need to fertilize.

Jesus... give em some nitrogen or grow nutes!

They have been getting micro,grow,bloom ag grow grow, cyco ryzo, b1, uptake and fulvic all appropriate amounts and ph is 6.6 at the end. I think I need some cal mag right?
1.5 x1.5 grow tent 1000w mh can't seem to get humidity over 35% either, temp 28 degrees.

Is that coco soil?

Yes mate coco with a small amount of plant food mixed in

Ordered a cyco pro kit comes with 12 bottles so I'm hoping there's something in there to help the deficiencys

Also to rule out under fert I just gave them full feed of all nutrients above, I think it's manganese or magnesium deficiency

Your ph is too high for coco.

I adjusted ph to 6 plants are looking better