Seedling nutrient deficiency

My seedlings have a nutrient deficiency of pale green to yellow new growth and i can’t figure out which one it is. I replanted them from tiny cells a week ago. I watered before i took this picture, of course they might be overwatered but knowing me and how i take care of things it’s not my first suspicion. I’ve done a soilless mix this year, and i think that’s probably where the issue started.

Important note: I did a bleach soak for most of the seedlings as i usually do, but i don’t think i rinsed them off long enough this year and i think the cotyledons absorbed some of the chlorine. They looked fine on first emergence but over time some developed splotchyness and necrosis. Those symptoms started in the seedling mix before i transplanted them into their current containers, so i would consider the problems with the cotyledons as mostly separate.

Here’s the mix I made:

6 parts coconut coir

2 parts perlite

1 part peat

1 part cocoa shells

Nutrients: Trifecta+ 5-10-4 (i followed the instructions for qty), and for the last couple of waterings i’ve been watering with the General Hydroponics Flora [bloom/gro/micro]).

[each is top dressed with half inch of coir to prevent cocoa shells from molding at surface]

looks like the ph is about 6.5-7ish.