having problems with my blue mystic

so i'm having problems with my blue mystic which is strange considering that the other plant snow white is growing just fine in fact its vivacious. instead of explaining the problem i'll just post some pics and hopefully can tell me how to bring this plant back to speed.



both plants are in flower.

the Snow white is a little droopy because i JUST watered it maybe 5 minutes ago. not worried about that plant at all. its healthy and loving life. but my Blue mystic seems to be.. uhh having some problems. i gave it some nutes and that at least made the stem green again and i noticed the rate of leaf death seems to have actually slowed/stopped but new growth looks good growing but then it turns into what you see at the bottom.

HELP!

Nute burn on the plant in the second pic. Cut back on you feeding concentration for a couple weeks and if everything looks right, slowly and carefully increase nutriens until you start to see leaf tips beginning to brown ever so slightly.

both has N tox. for the first one mtgeezer is right,
the second, I think it would not be enough just cutting feeding, you should flush the soil.
my suggestion is flush the first one to