evil_xander
Contributor
Why several hours under water? What temperatures are you diving? 
Anyway, yes, as others have said, you can just sling an AL tank under your left arm, and depending on D ring placements on your BCD this can be a good or not so good scenario...Just make sure it's an AL tank, not a steel one because of buoyancy characteristics.
But, if I were you, I'd just dive as much as possible and forget the multi-tank story until some further notice. Everytime I have to do the load/unload/load/unload, get them on/off task and get refils I really wonder who is it that actually sold me this concept of 'diving is fun'...
Anyway, yes, as others have said, you can just sling an AL tank under your left arm, and depending on D ring placements on your BCD this can be a good or not so good scenario...Just make sure it's an AL tank, not a steel one because of buoyancy characteristics.
But, if I were you, I'd just dive as much as possible and forget the multi-tank story until some further notice. Everytime I have to do the load/unload/load/unload, get them on/off task and get refils I really wonder who is it that actually sold me this concept of 'diving is fun'...
