For those who like water sports, swimming around with the assitance of Scubapro sea glider is a dream: virtually little efforts and possibility to use a snorkel instead or bulky diving bottle.
However for serious dive, small twin tanks are the best.
When spear fishing is preferred, a good wood frame spear gun is incomparable. Mine, home design, made by a real professional offer two options:
-Standard: One or two bands, monotype diameter according to the fish available.
-Open water: Add-on 2 pulleys: 3 bands monotype for long shots...fantastic with a reel and a line cuting tool so the big fish cannot go away with your gun if your shot was not deadly!
