Using a different tank!

[SteveTW]

I usually dive with my HP 100's. I got a good deal on a LP95 last year and never dived it but it's about time. What should I expect weight wise when using this tank?
Thanks, Steve

 

[dannobee]

Scuba Cylinder Specifications from Tech Diving Limited - 928-855-9400

 

[Scared Silly]

Depending on the mfg, both cylinders have very similar characteristics in terms of overall buoyancy (-8 to -10 lbs.) as well as buoyancy shift (100 cuft vs 95 cuft assuming a proper fill for both). As such, I would probably not do any changes with your weighting.

 

[Bubbletrubble]

Going from HP100 to LP95 tanks, you may have to add anywhere from 0 to 2 lbs., depending on tank manufacturer.
Theoretically, you should be able to compensate for that difference with lung volume/breath changes.
When in doubt, do a weight check.

FWIW, the LP95s that I have dived have trimmed out nicely. Enjoy the new tank.

 

[SteveTW]

Thanks for the feedback.
Steve

 

[kanonfodr]

The tanks shouldn't have too much difference in their bouyancy when at 500 PSI, unless your HP100 is one of the Asahi spun steel tanks: those are boat anchors! BTW, I loved my LP95s as they trimmed out very well for me. I just got lazy (and my air consumption improved) so I switched to LP85s (43 lbs full for the 95s vs 35 full for the 85s) for my shore diving. They are really nice tanks, though.

Peace,
Greg