I'm relatively new to diving, about 2 months and 12 dives so far. What I
was wondering is this. How much time should I be getting out of an alum
80 at say 2,900 lbs. ? I know this has a lot to do with depth and some
other factors but so far I'm getting about 40 min. at 50' from my 80. Is
this horrible or average for a new diver? I have a very "liberal" reg.
What I mean is it delivers a lot of air when you breath in. Virtually NO
restriction of breathing. I like that, it's like breathing on the
surface. It's an older Sherwood I bought used, called a
"Blizzard/Magnum" I think it's about 10 years old or so.

Thanks for the help,

Shawn