m0useanswered grow question 2 years ago Might just need more time. If the one plant recovered in 3 days he other might need a few more. Could be that its transplant was more stressful.
I agree with the below statements of overwatering.
The previous weeks all look like they are experiencing N tox. This could also be a buildup in the medium. Monitor your EC when using liquid nutrients for better control.
Good Luck!