My leaves are yellowing at tips and around edges

So I started theses seeds and am starting to notice s few are starting to yellow around the edges and at the tips. The tips are also curling a little. I am using roots organic original soil and roots organic budda grow every third watering at 1 table spoon per gallon. My lights are two t5 floros and on led red blue at 14 inches. In not sure what the problem is. Only two plants are yellowing.

you're probably over ferting. just give water for a while, plan on transplanting to a much larger pot. you need to give more info in the future as to what you do. how often do you water? how large is that pot? roots can probably go a while before you need to fert. same thing with foxfarm soil, which might be able to go the entire grow without extra fert if you use a big enough pot.

I don't think the perlite looks to good in the 1st pic.
Possibly a sign of overwatering IDK.

Both answers are correct I think. Over fertilization and over watering.

Only water when pots are very dry and light and the soil has changed to a light color.

And new plants don’t need any nutes in that soil for 3-6 weeks likely. It is packed with nutrients and even a mature plant can go 2 weeks in it with only water.

When pots are dry run fresh water through until at least 20% runoff then water again when dry 3/4 the way down the pot. No nutes yet.