I bought the Apollo bio fins only about a month ago to make the long shore swims out on our backs more comfortable, and less anaerobic. I figured they'd lower my SAC under that water as well.
Well, one month later I can't say enough good things about them. On the top of the water, on my back ( and even in a snorkeling position it seems), they really are MUCH faster and MUCH more efficient. There is no doubt.
Under the water, for these shore dives where all we do is swim, I have been able to use noticably less gas while going very noticably faster.
Sure, it doesn't really matter what fin I use when I finally get to where I'm going, or on drift boat dives, but im comparison to my regular buddies there is nothing but marked improvement in my ability to stay out there. The bio fins were, essentially, in lieu of buying a boat (which comes next I hope).
Somewhere in another forum is the story of me doing 3 progressively harder (i.e more kicking) shore dives by noon one day, the last of which was a search for a camera that remained hidden throughout my marathon kicking adventure. I could not have done those dives, to that degree, covering that much territory, with Jetfins, my Rocket II's, or any blade fin I've ever used. That afternoon, when a buddy finally showed up (giving me time to fill my three tanks), I went for a fourth shore dive. Immediately before receiving the bio's, with the most efficient frog kick I could do, I would have been limited to two shore dives that morning, and would probably have had such burning legs (from kicking out, and to some degree back in, more-so than from the actual dives) that even the later dive would have been questionable.
