Mi Espanol es muy mal.
No secrets...50mm f1.8 lens on extension tubes. Hardest part was getting it in focus. Dripped water from a ziploc into a glass pyrex pan. Put a piece of the girlfriends scrapbook paper behind to bounce the flash off. Tripod of course.
This was the first try just to try to dial it in. I just bought a SWEET 105mm f2.8 1:1 macro lens for $70 shipped (one of the sharpest ever made so it's said; I made out like a bandit), so that should help out a bit on the next go round. I need to get a better background or rig a second flash to get multiple colors in the water.