Quote: (Originally Posted by
sasdasdaf)
graham - sending you an e-mail. to be honest, i am only familiar with US steel tanks. 15L sounds like a good size for tech 2 level dives. but i don't know anything about their shape, buoyancy characteristics, etc.
Very hard to trim, the diameter is as same as 16, 18, 20 but they are quite shorter. I have D16 which are much, much better then 15. If you can handle D18 it's even better choice. Both are usually slightly positive when empty or close to neutral.