yes, even though the tank as a whole is negative, the bottoms start to lift. An LP50 or LP85 with low pressure remaining can be sat on the bottom and it will do a "head stand" even in fresh water. I used to just deal with my tanks being a bit out of trim if I dove them low (butts up when I had less than 1200 psi) but now that I use thicker loop bungees and treat the tanks like an aluminum tank, they can be in perfect trim start to finish. Just a couple days ago I did a dive in 41 degree F water (to grants point of using thick gloves) and ran my LP 85's down to just under 300psi each. They were in just as good of trim at the end as they were at the beginning.
