J-FRAME, as everyone is telling you, this is a common problem for new divers. What reduces gas consumption as you gain experience is an improvement in efficiency -- efficiency in movement, buoyancy, and breathing.
Have a look at THIS recent thread, which has a lot of good information in it. And accept that a 6'6" man is highly likely to have an optimal gas consumption rate that will be higher than his more typical-sized buddies. That's what HP130s are for
Have a look at THIS recent thread, which has a lot of good information in it. And accept that a 6'6" man is highly likely to have an optimal gas consumption rate that will be higher than his more typical-sized buddies. That's what HP130s are for