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15l tanks

Discussion in 'Cozumel' started by flyboy08, Nov 28, 2019.

  1. flyboy08

    flyboy08 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: NYC
    3,064
    1,926
    113
    For the first time, I opted for 15l tanks for my December COZ visit. In the past, I’ve used 80cf...with 12 pounds of weight. What should I expect differently besides a bit longer bottom time with this Aluminum 15l over the 80cf?
     
  2. ggunn

    ggunn ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Austin, TX, USA
    9,844
    3,144
    113
    You might need to carry a little more weight to be neutral at the safety stop.
     
  3. ChuckP

    ChuckP Manta Ray

    # of Dives: 200 - 499
    Location: Cozumel
    707
    533
    93
    Couple pounds but I’m curious as to what they’ll be filled to - an 80 is rated at 77.x at 3000psi, the 100 is rated at 100 at 3300. If they are filled to 3000, you are only gaining about 15cuft if my math is right, it is more though.

    Maybe I should rent out al40’s???
     
    Jayfarmlaw likes this.
  4. DandyDon

    DandyDon Old men ought to be explorers ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: One kilometer high on the Texas High Plains
    48,654
    4,400
    113
    20% more sounds great.
     
  5. ChuckP

    ChuckP Manta Ray

    # of Dives: 200 - 499
    Location: Cozumel
    707
    533
    93
    I don’t personally think it’s worth the hassle but I understand why one would do it.

    Tanks are bigger diameter and they don’t fit in the tank holder on the boat lol.

    He’s got a lot of dives, more than likely just big lungs - I really hope they give him full tanks and he has a great time, I’d try anything to stay down longer.
     
  6. DandyDon

    DandyDon Old men ought to be explorers ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: One kilometer high on the Texas High Plains
    48,654
    4,400
    113
    I always dive the 100 cf Al tanks, every dive for the last several trips. I've always been an air hog, worse nowadays. I know that they don't fit the 80 cf holders, not as convenient, but I pay $5/tank more. They're not for everyone, but they are great for some.
     
    Trailboss123 likes this.
  7. flyboy08

    flyboy08 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: NYC
    3,064
    1,926
    113
    As a pilot, there’s nothing worse than the altitude above you, the runway behind you and the gas you left on the ground.

    As a diver, nothing worse than the air you left on the surface. I’m not an air hog, but not as good as my buddy (wife), so I’m looking for about 15-20 minutes more air time.

    I’m healthy, in great shape, ride and lift daily, but I have large lungs and a 50” chest....lots of air to feed:)

    Thanks for your responses.
     
    Trailboss123, ChuckP and DandyDon like this.
  8. cvchief

    cvchief ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Cozumel & Pennsylvania
    6,287
    3,268
    113
    Yea, you arent ever getting more than 3,000 in a tank. They don't care about the working pressure.
     
  9. Jayfarmlaw

    Jayfarmlaw Divemaster

    # of Dives: 200 - 499
    Location: Tuttle, Ok
    1,297
    1,026
    113
    I'm an air hog as well...big guy, big lungs, and all that. I even bought my wife a longer octo hose so I can get on her "Hose of Shame" so it's more comfortable for both of us. About 5 years ago, we started diving with an op that uses the steel hp 120 tanks. That made it much more enjoyable for everyone around. Even when I would upgrade to the AL 100 tanks, it didn't seem to make that much difference. The steel 120's give us 90 minute dives. She dives a HP100 and it usually works out perfect now. If we start deep and stay deep, I may need her hose for 10 minutes or so just to extend the dive before going back on mine for the ascent. I believe the three ops using the steel 120's are Aldora (our choice), Living Underwater, and Liquid Blue. Unless your married to your dive op, which I completely understand, you might give the big tanks a try.

    Good luck, safe travels,
    Jay
     
  10. ChuckP

    ChuckP Manta Ray

    # of Dives: 200 - 499
    Location: Cozumel
    707
    533
    93
    I didn't think of that too - bring a seven foot hose and have the shop swap the hose out on your wife's 2nd - heck even if you are doing 100's - you paid for it, breathe it!

    I have one here that I rarely use unless I'm working by then or sidemount diving - you're more than welcome to try it.
     

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