Life-Is-Good-Diver
Contributor
Rick Murchison:I recommend PST E7-100's
These will give you about 87 CF at 3000 psi (each); if you need the extra gas you can pump 'em up to their rated 3442 psi for 100 CF each - and they're about the same size and (empty) weight of AL 80's.
Sweet tanks, plenty of gas.
Rick
I would have to agree with Rick. I owned 3 set's of Double's for different type's of diving. I used LP 104's pumped up for long cave dive's, and used HP 100's that were great for rec diving.
One way I look at it, by the time I put a single 120 or 130 on my back, then add a 30 Cf pony for back-up, im almost carrying enough = to a small set of double's. One thing I like when diving a smaller set of double's like HP 100's is I will use them on a deep dive like 100' , then have enough air to dive a 60' reef drift diving afterwards, and I have complete redundancy on both dive's without having to " sling" a pony bottle.
I tend to agree with everyone here on the board, 120's or 130's is over kill for rec diving.
just to give you an idea, I can cave dive at peacock and get close to 1,200' in and turn on rule's of third's, that's close to an hour and a half of diving between going in and coming out, and I'll still have a third left when exiting, that's allot of air for a non over head environments just for rec diving if you see what I mean.
At 100' in depth, you'll problem wouldn't have more then 25 min bottom time, I'll have to look at my planner, you can really do that off a single 100 cf tank to a 130 cf tank if your alittle heavy on air, and throw a H valve on for redundancy.
Myself, I'll buy either Faber 95's of a set of HP 100's again and start using them on the same kinda diving, I may not need all that air, but at least I know it's there for someone else if they need it, plenty of air can't hurt, but no air can cause someone their life!