Seed Beads like the ones in the link below are an affordable, extremely effective, and versatile/customizable alternative to expensive diffusers. Many companies sell beads http://rainboweyecenter.com/stones/index.html that are much larger than the seed beads http://www.shipwreckbeads.com/catal...u/itemsPerPage/20/page/4/item/10SB212#10SB212 and MUCH more expensive. I recommend between 6/0 and 12/0 http://www.landofodds.com/store/seedsize.htm . They pose virtually no risk to glass pieces and downstems, get shuffled around by the vapor that is traveling through the water, and provide excellent diffusion of the vapor, splitting it into carbonation-like tiny bubbles (due to their size, the holes in the center, and the spinning/shock-absorbtion of the shuffling beads). I am hoping that this thread will become THE place to share ideas about using beads for diffusion, to provide links for those trying to find beads, to discuss experiences using beads for diffusion, and to seek insight from others who have used beads for diffusion. What kinds of beads have people used? How did they work for you? Does anyone have a video of seed beads in action? Thank you in advance for contributing to this thread and helping to keep it 'on topic'. I cant wait to hear the experiences and ideas of others.