After more than a year of experimentation and frustration working with underwater strobes for my poolwork, trying HID video lights etc,
I finally bit the bullet and set things up the way I really want to moving forward; using studio strobes as my primary light sources.
The good Dr. Mustard (and Howard Schatz) helped to convince me that I need to do this if I want the flexibility I need.
So I set up my studio strobes with appropriate precautions; I used 20 pound bags to stabilize the stands and GFI's for each strobe with the outdoor grade electrical cords well away from the pool area.
Instructions to the model to get in and out of the pool away from the lights as well.
Used a long Nikonos type cord to Pocket Wizards on the light stands and a single Subtronic Nova on the camera at 1/32 and 1/16 for fill only.
This time I used two outside strobes - a snoot behind the model to pick up the hair and a single softbox to the right.
Next time, once I get a couple more long cords and another Pocket Wizard or two, I will likely place the underwater strobe(s) off camera on a stand in the pool, and maybe even a third outside studio strobe.
Here's a pic of the setup and an example.
You can see a few more at