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All Other Gear Tanks, BCDs, Regs, Fins, Stringers, and all other gear we use in Spearfishing.

View Poll Results: What tank do you consider your primary (most often used)?
Steel HP 120 4 25.00%
Steel HP 100 2 12.50%
Steel HP 80 0 0%
Steel LP 120 1 6.25%
Steel LP 100 0 0%
Steel LP 80 0 0%
Aluminum 100 2 12.50%
Aluminum 80 6 37.50%
Other Aluminum 0 0%
Other tank not mentioned 1 6.25%
Voters: 16. You may not vote on this poll

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Old 11-27-2002, 07:26 AM   #16
Steel Shootin'
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I'm ready to trade in my HP 100s on some HP 120s.
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Old 11-27-2002, 08:33 AM   #17
rusty
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As much as I like my LP108, it's size can be a pain on some boats. Just bought a pair of 2 year old HP120's (O2 cleaned, $275/pair), and ordered a DIN conversion kit for my reg.

Funny how the number of tanks you have seems to grow...
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Old 11-27-2002, 01:39 PM   #18
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lp

i dive my lp's five days a week and they arwe the most durable. i am a commercial diver and my shit gets put to the test. five days a week and i still only own two, i think i'll buy another two pretty soon.

oops- i meant for this to be a reply to the tanks thread
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Old 11-29-2002, 11:20 AM   #19
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For me, tank selection is more boat than depth dependent. My favorite overall tanks are the lp 85's (7" diameter and very streamlined). When filled to 3500 psi they carry 112 cu. ft. Only downside is they tend to rattle around in the "roll control" type racks. Mostly I use luxfer 80's, other times it's the lp 85's, 98's or 104's in that order.
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Old 12-07-2002, 08:27 AM   #20
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My primary tank is a steel 120, and usually filled to 3500, love that air!
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Old 12-11-2002, 06:50 PM   #21
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So many choices....

I was looking at some new tanks but the steel ones sure are expensive! They are very proud of them.

I'm not sure its worth buying new steel tanks if I have al 80's already. I'm thinking on maybe getting one large capacity tank for the 140' dives just so I have some reasonable bottom time.

Whats the recommendation? 100? 120? Steel (lp I think, I don't have din on the mk25 reg they don't have yoke usually on hpsteel do they)? Do shops normally overfill lp steel tanks or do you all run into some trouble some places? Probably use 28% o2 on my 140' stuff so a 100 or 120 at this depth last how long for you all on avg - I know everyone is different but I'm no airhog.

Thanks,
Scott
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Old 12-12-2002, 10:41 AM   #22
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ScottC,
"One large capacity tank" means your dive will more likely be limited by the recreational ndls (5-14 mins depending on the tables/computer you choose) of the chosen gas than by the actual quantity available. BTW 28% is a little on the rich side for spearing at 140'. This isn't really a dive; it's more like a bungee jump. If you can keep your s.a.c. around .75 cf/min you can do it (10 min bt, 3 min descent 5 min ascent) with an 80 and have enough leftover to do 25 mins. at 20'.

I think everyone has already posted their opinions on tank size and why since that was the original poll question.

No, most shops probably won't fill lps to 3500, but if you are willing to wait a few months pst will be selling the old lp tanks with hp ratings. The old 95 will now be legal to fill to 3500 and will be rated as 126cf and the 104 will become a 138.

If you don’t' want to switch your regs to din you have one other option, though I don't recommend it. Both OMS and DiveRite make a 200 bar din valve with a screw-in style insert. These inserts will give you the option of using any yoke or din reg on the same cylinder.
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Old 12-13-2002, 12:48 PM   #23
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Of course, you have to remember that the reason HP tanks come with DIN valves is that yolk O rings have a bigger tendency to extrude under higher pressure. Not something you want happening at 100+ feet. Kim and I both dive HP steels, only have 2 AL80s left are are considering dumping them for 2 more HP100s. The Scubapro DIN conversion isn't that expensive, and gives you a much better tank to regulator connection.

FYI, almost any dive shop that has cave divers as patrons will fill LP steel tanks to #3500.
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