Young starts showing problems - need help diagnosing

[Pacnw]

Hey everyone,
Got a few starts, Sensi Star (Paradise) and Purple D (CSI Humboldt) going and they are showing a couple problems. I've tried diagnosing by looking at charts and I can't figure it out. Whole plant looks healthy except for these signs. I've attached a couple pictures. First one is Sensi Star and second one is Purple D.
NOTE: Forgot to add that I'm using Nectar for the God's nutrients and following their guideline for young starts.

 

[Madbud]

Just overwatered, let the soil dry a couple days.

 

[Jimster]

It's probably just a splash from watering or feeding... leaves are really sensitive when young but get tough quickly. I think that whatever the problem is, there is no reason for alarm and the plant will probably grow out of it quickly. Have you sprayed them with anything? The marks at the end of the leaf tips looks like residue marks, where something ran down the leaf to the tips, then dried there. Depending on what/if anything was sprayed, it might become more damaging when it concentrates via evaporation. Just My opinion.

 

[Aqua Man]

Time to transplant

 

[Madbud]

Time to transplant

Yup