clones yellowing once rooted

Currently running a bub a, wonder woman and ak-48. I've taken clones from my mothers and for some reason my clones always turn really yellow once transplanted into my soil medium. Using rapid rooters, clonex, dome. Getting good roots. Once transplanted into my fox farm haply frog with Mykos and garden lime my clones always turn yellow. Also use ro water with 3ml calimagic per gallon. Under 400 mh with proper distance.. any suggestions?

Kinda looks like magnesium def

Either overwatering or over feeding at this stage.

my cuts usually root in a week or a bit longer. when i see the leaves yellowing, i know the roots are developing. my neighbor "never," gets yellowing, lol. he uses a couple of clone nute mixtures. i can't remember what he uses, but next time i go shopping, i'm getting some. i wanna say clonex, but i'm not sure...

Km only feeding with ro water and calimagic to supplement calcium and magnesium. I've only watered once so I Dont think either of those are the answers, but one could be....

I use clonex with my clones and I always get that initial yellowing for some reason

Maybe they're not taking up nutes from a little transplant shock. How long did it take in your past clones to start greening up?

Isn't yellowing a good sign that there rooting and looking for nutes....feed them bitches