Your plants are WAAAAAAAY too small to be adding ferts of anything at this time.

You gotta keep the pH as close to neutral as possible at this stage.

I mean by the light....you need to get them into a darker soil container. Something that will buffer the heat and light from those soil containers.

No more nutes.
pH 7.0
Transplant into real flower containers, slightly larger than you are using now.
Get a fan on them at the top.

Make sure you put gravel or lava rock at bottom of container when transplanting.

Good luck.