Tank size for a short guy:

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I was thinking of a 117 or even the 133. It would be nice to have that much gas.
 
I do not like an 8 inch tank as a single. It seems unstable wanting to turn downward. I would stick to a steel 100 or 85 for all single tank dives. This is my opinion and it will remain just that.
 
A real nice cylinder is a Genesis 80. HP cylinde, (3500psi) about 2/3 height of an AL80 and 7 1/4 inch diameter. They were manufactured by Pressed Steel and there are many used available.

Dale
 
Currently, I am using double LP72s. However, after a boat dive, I have discovered that they're a bit much of a pain in the butt to deal with. They also provide a bit of an excess of gas for my needs.

with that statement, why not DBL- AL63's?
 
I do not like an 8 inch tank as a single. It seems unstable wanting to turn downward. I would stick to a steel 100 or 85 for all single tank dives. This is my opinion and it will remain just that.
I agree.

It's worth noting that a diver used to a fairly floaty AL 80, which acts kinda like a dirigible with the diver suspended underneath for much of dive, is very stable, while most steel tanks can be a real handful on a single tank recreational BC, especially early in the dive when they are 10-11 pounds negative, and when used on a BC with 1) a "soft" cam strap system, 2) no back plate or cam pack, and 3) most of the lift located under the diver and far below the negative buoyancy of the tank. That's a made to order stability problem.

The 8" diameter and 42-43 pound mass (and 50 pounds if you count the gas) of some of the larger steel tanks just magnifies the stability problem.

In that regard an X7-100 is about as nice as it ever gets with a steel tank (except for the steel 72, which is a sweet tank to dive) as the weight is only 33 pounds and it's a 7.25" diameter tank.
 
That's not short. I'm 5'5". :wink:

For doubles I'm diving Worthington HP100's with no problem. Singles I use LP95's. I'm eyeing some Worthington HP120's (the X8's) for doubles. They are similar dimension wise to LP95's.

I've never had a problem getting my HP's filled, but I have had to educate a few tank monkeys.

Either way, the 100's are comfortable and very manageable. HP tanks are becoming more popular as well, so it's rare anymore that I have to explain that they can be filled to 3442. Most of the shops I frequent though are in cave country, so they don't really bat an eye.
 
No, twin 50's are heavy for the gas you get, although they do trim nice.
 
I do not like an 8 inch tank as a single. It seems unstable wanting to turn downward. I would stick to a steel 100 or 85 for all single tank dives. This is my opinion and it will remain just that.

What do mean by that? BTW, I have a BP/W not a recreational BC.
 
https://www.shearwater.com/products/teric/

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