I really cannot say....anesthetics? Flight duration? Pressure issue..I do not know. what I really want to know is when this will be over..( need some sleep )
once again, GET A POWERHEAD with air nozzle... as bubbler will not do the job.
put their face in front of the moving water with o2.
push them toward and pull them backward repeatedly.
do this until they have the strength to swim out of ur hands.