Quote: (Originally Posted by
E-man)

No one can keep up 1.6lpm for over 20 mins, heck no one can keep up 1.35 lpm for over 20 mins, but they can do bursts of up to 5 lpm of CO2.
actually it is not a problem to keep up 1.6lpm for quite some time... even some hours
question is if you do this under water.
paul