It really depends, I often use Worthington Steel HP130s and Aluminum 80s for Decom on the tree or as a traveler. Again it really depends on the dive.
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this thread is to all with the question of what tank is right for you
I think your poll is going to be a bit limited in choices for most people. I have LP108's that I bought for cave diving. When "cave filled" they hold ~300 cft of gas and I found them to have comfortable trade off of weight out of the water and buoyancy characteristics in the water.
very few tanks in the running...
Man, that's one heck of a cave fill!
108/112 is the same cylinder depending on whether you're talking OMS or Faber. Look at chart in my previous link.
Apparently the difference is rated capacity.
Oms rates 112 cft @ 2640 (2400 + 10% over fill)
112 cft @ 2640 = .042 cft/psi
.042 x 3600 psi = 152 cft x 2 = ~305cft