They don't get RI just from high humidity in itself. RI is caused by poor ventilation and an unsanitary environment, other improper husbandry or prolonged stress. Or from another snake, since it's contagious.
Just make sure the vet does a culture to make sure it's correctly treated!
I personally would move the snake to a quarantine tub instead of moving him over to the T10, which is just another potential source of stress for such a small snake.