Dont know whats going on with this seeds men but having same and similar issues the same seeds before
This white marks part of cotyledons tissue and tips of first leaves coming out white and ending up burned, Ec 160 (tap water)
Someone said it could be pm but idk pm just dont go away, Does it?
Could it be light density, I had them at 60 cm under a dome at 25% ts1000 (150w)?
They're going but to slow