Coco loco newbie

hi y’all! I have two two week old seedling in coco, two In FFOF, and one in dwc. All are doing ok but my two in coco have some deformed/uneven leaves and have really hit a stall in growth compared to the others. I’ve been watering/feeding with a ph of 6.0-6.2 on a daily for my coco plants.( is that the correct ph to use) temps are always between 73-79f humidity 50-60%. I’m currently using Cali pro two part nutes at 50% but giving the recommended dose of cal mag? Any advice?

You have two variables that make it more of a challenge.

1. Seeds are like litters of puppies. Each potentially unique in their own ways. Phenos.

2. Different mediums.

What kind of coco?

ive seen that stuff https://foxfarmfertilizer.com/item/bush-doctor-coco-loco.html

It coco loco ... all plants are in the same environment but only coco ones seem to be struggling. What does pheno mean?

Also on some of my seedling the edges (not tips) are curling up! Just the very badges though! Any particular reason why?