Tank size for EAN50

[MonkSeal]

Personally, I have a 7 litre (what's that in cuft?)

7 liter is cca 52 cuft (at 200 bar). You forgot imperial units pretty fast - it's EU influence.

I also have 7 liter old one which I plan to replace and I'm considering 63 or 72.

 

[ScubaTricky]

You forgot imperial units pretty fast - it's EU influence.

Nah, just too young to remember them

 

[Tom Yerian]

I like to use as a minimum, a 40, most of the time I use the 50, more gas, I usually ride it all the way out.On longer and deeper dives, with longer deco, I like to use (2)two fifties.50%/100%,as a min....Capt. Tom