render/model lots of bubbles in water.

I am trying to render a tube full of bubbles like this one for a liquid cooled pc. I quite frankly don't know where to start, Is there a way to make bubbles using an apperance or is it something I am going to have to model in SW (if so then how)? Im trying to make something that looks like this-

http://www.million-dollar-pc.com/gallery-2009/special/pius/switzerland-13.jpg

Thanks

SolidworksPhotoview 360