It depends on the dive My cave dives are done with steels. My Intermediate ocean dives are done with double Al. 80's. Deep and/or long ocean dives are with double steel 95's (am thinking of upgrading to 104's or 119's) All stages and deco bottles are Al 80's or 40's depending on the gas requirerment. The argon bottle is Al 6 or 13 cu.ft., again depending on the duration of the planned dive. For the shallow ocean dives, I still like the single steel 72, in very warm water---of course.

My first set of double's were a set of steel 72's. This was a good intro into the diving with doubles. The single 95(steel) is also a good intro into the "more gas required dives" while still using the BC single reg set-ups.

So My answer? IT ALL DEPENDS