Leaf margins yellowing in veg

[Alpaca]

Hey,

a few days back I started noticing some leaf edges turning yellow.

I'm not too sure what the issue is here, only my watermelon zkittles both seem to be affected, the wedding cakes on the right are fine.

I've only fed them once so far and added some calmag a few days back. Waterings are at pH 6.5 and my 400w QB is 28 inches from the tops. Any ideas?

 

[TripsRabbit]

They look hungry for nitrogen

 

[coherent]

Soil? Coco? I'd give a light basic nute feed in soil and if coco, increase amounts a bit.

 

[Alpaca]

Soil? Coco? I'd give a light basic nute feed in soil and if coco, increase amounts a bit.

Soil, but it's lightmix so there's few nutrients available. I did mix in some bat guano for the veg phase. Might feed some more nitrogen next watering