new tank...

awills101 · Apr 26, 2009

i just bought a faber steel hp100 and ive never dove a steel tank, what would be a good amount of weight to drop to start? i dive a 7mm wetsuit, gloves boots and hood and currently dive 26lbs, the tank is -14.1 lbs full and -6.7 lbs empty

thanks

Hockeynut · Apr 26, 2009

Depends on what you were diving before but probably around 5 lbs if it was a AL 80.

JBRES1 · Apr 26, 2009

This is a very heavy tank.
I would start off by taking 10 lbs off, and work from there.

Jim Breslin

Hatul · Apr 26, 2009

Take the buoyancy of the new tank and subtract the buoyancy of the old tank. That's the amount of lead to shed.

Adam

JDMerk · Apr 26, 2009

I have two of the same fabers as you. I carry ten lbs when diving my 5mm. If i was wearing 7 mm i would wear 12 or so...

TMHeimer · Apr 26, 2009

With my steel 120 I use 34 pounds and weigh 200. I use the same wet suit, hood, etc. as you.

sam1 · Apr 26, 2009

See Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan

If you were using an AL80 (e.g., Luxfer) the buoyancy empty (w/ valve) is + 4.4 lbs. As you report, your new tank is -6.7 empty for a difference of 11.1 pounds. Quite close to the 10 pounds that JBRES1 recommended as a starting point.

wxboy911 · Apr 26, 2009

Just a question...is that a mid pressure or High pressure? It sounds like its a mid...3180psi working pressure with a + so it can be filled to 3400ish. If so that is the same tank I dive and I dropped 8 to 10 to start because its so negative at the end of the dive. Try taking 18lbs to start and see how negative you are at your safety stop.

awills101 · Apr 27, 2009

yes it is a mid with the plus rating
ill probably take 8 off to start, i just recently went down to 26 and it feels a little light

gmanstan · Apr 27, 2009

I dive a 100HP with a 9mm(9/7/6) and 3mm shrty I use 22lb.s for boat diving and 26 lb.s for shore diving ,I might go a lil lighter now that a) my suit has compressed a little b) i am more comfortable and better at controlling boyancy.I find that even with the heavier tank on shore dives as you get shallower you find that you need a little more weight at the end when tank gets 500lb.s or less,not as bad as with the aluminum but you still get a little light.

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