Quote: (Originally Posted by
Mikel-Deko)

Hi
Do you test your buoyancy with them full or empty?
Mikel
I only counter for one of them being empty. I figure that once the the deep bottle (1st bottle) becomes positively buoyant, I'll send it up my line. I used to do this OC trimix diving and works well for me.
So I'm only really concerned with breathing my 50% down low and buoyancy offset that creates.
Cheers
Rich