Is this all nitrogen burn?

I have battled with high 80 temps. One day got to 91F. Which will be fixed tomorrow. Humidity is around 60. It is in a 3 gallon plastic bag pot I was trying out. Never again. Should I flush it out and water to ph?

It's not N burn. It could be another excess if they are drinking a lot in those high temps.

Thank you. I finally got the Tips under control in the high 70s low 80s. Humidity is still a battle but I got it up with 2 Humidifiers and one 2 x 4 tent.

Temps*