Website background - bubbles

I am doing a website refresh. I am looking for an image I can use either to tile a background, or as a complete background image. I want to have moving bubbles in the background that look relaxing - for a Hot Tub/Spa website (look at [login to view URL] for an idea of the Spa I am doing it for). I would like the water to be a light, clean looking blue, with the bubbles, all different sizes, moving around in the water; Energetic because of the spa jets that make the bubbles, but relaxing at the same time. I would need to see the image you propose before acepting please, I want this to eb a quick and easy project.