eelnoraa
Contributor
eelnoraa:
It's simple. Comfort. For some of us who dive in cold water, the additional weight becomes a burden. With a steel tank, I dive with 12-14lbs and a full 7mm wetsuit. With an Aluminum tank, I would need to dive with closer to 20lbs.
At least to me, being more comfortable underwater justified the cost of a more expensive steel tank. There are plenty of divers who do not feel the same.
Here is what I don't get. If you said comfort ABOVE water, I can understand. If you said trim underwater, I can also understand. But you actually don't feel the more weight underwater because you set yourself up neutral to begin with, so under water you will be neutral with AL or Steel tank.
C.
Here is what I don't get. More comfortable under water is NOT due to the negative characteristic. Yes, you carry less "dead" weight. So it makes more comfortable ABOVE water. Once under water, you should be weight yourself exactly the same with steel tank or AL tank. The extra weight you carry with AL tank, you should NOT feel it underwater.
The HP100 allows you to take about 7lbs off your weight belt; more comfort and improved trim as it distributes the weight over your torso instead of one point.
If filled fully you get more air as well.
Adam
This I totall agree. I am 5'6". Being able to use a shorter tank, more air, less weight is a big plus about HP100. However, it is at least 2x the cost of AL80.
A HP100 tank is about the same size as a AL80(well, a bit shorter), and carries more gas. Most places will charge the same amount for a fill too ($10 lets say), even though your tank is 20CF~ bigger.
It's also 6lb~ you can take off your rig, and if you need to descend in an emergency at the surface there's less issues there. Resale values are close to the original prices too.
Now, LP tanks... Nah. Bigger, bulkier. I wouldn't use one over an AL80/double AL80/AL100.
Yes resale value is higher, but you also pay more to start with. And I don't get the descend in an emergency statement. With whatever tank, you carrie the right amount of weight so that you will be neutral with emty tank at 15ft for safety stop. Having a more negative steel tank, you carry less weight. So you don't descent any faster.
Overall, I do agree steel tank is a better choice especially in cold water, but to call AL80 a bad tank, "Evil AL80", I don't think they deserve this reputation.