Whats up with these plant??

Whats is up? I think to much water........ There are in a super soil water only.

Sorry, here they are 5 days ago or so.

They look like you watered them very recently, but not necessarily over-watered. What makes you think cal/mag or iron could be an issue?

might be my eyes but looks like theyre light green not yellow as such and no real brown crispy necrosis spots, did it start in one area? is ph ok inc run off? what about feeding some n

You need some Nitrogen to get them good green.. also i see some purple stams and leaves, whats your night temperature like?

Is the white square where u water? It says water on the tape. U got a big grow...over 15 plants in the background. Are those the only 3 acting funny?

They need some nitrogen. Some CaMg Wouldn't hurt anything as well. Just give them a good watering with a light dose of Nitrogen ,Calcium,Magnesium Things should be A+ after that.

normally overwatered plants droop but i have seen that look from heavy wet soil with little air. cold nit temps or millipedes also do it

Nitrogen deficiency definitely seems to be your main problem