Water ripple effect on background of website

Not sure if you are still looking but this has a good demo/tutorial on the effect: http://code.almeros.com/water-ripple-canvas-and-javascript#.Ukpfe2QY2ok

Demo is here: http://code.almeros.com/code-examples/water-effect-canvas/#.UkpiQmQY2ol

Have a look on these 2 demos, which i think you can get based to create yours.

29a.ch and mrdoob

Hope this helps

For a high performance, WebGL powered solution, take a look at this project:

jQuery WebGL Ripples

A demo is available here.

This technology is not available for everyone in every device yet, though.