elan
Contributor
300 psi in LP108 is about 12cuf that could be insufficient rock bottom for dives to 100ft even for 1 guy.
If you don't already dive with a pony, you might consider adding that instead of the cost of new tanks. You shouldn't burn into the pony its true, but you could burn your 108s down to 300 or 250 instead of 500. Do the math and see what extra cus you get doing that. I routinely burn my AA100s down to 250, though its always after the 15' safety stop at min 500. It takes a whale of a long time to burn 250psi at 10' or 15'...good time to practice basic OW skills, practice lowering your sac, playing charades etc