What u think on these discolored leaves?

[Eternulwinter]

The plant in the back left has some yellowing on some of the midway fan leaves

the other plants are just fine but it is a different strain what does it look like the issue may be here

 

[phxazcraig]

Feeding anything? Grow medium?

 

[N1ghtL1ght]

possible Mag deficiency (it seems to be also on lower fans)
maybe feed with something balanced higher EC as usual, but no PK booster it got to have N in it as well + micros

 

[mysticepipedon]

Looks like Mg to me, too.

 

[Eternulwinter]

Looks like Mg to me, too.

Cool I’ll hit it with some magnesium salt