I didn't mind the noise, but I hated the mess the bubbles popping made on my drywall. To solve that, I used a piece of packaging that a CFL light bulb came in. I basically cut the molded piece that goes around the bulb out, making a half shell. Then I zip tied the part of the packaging that goes around the base of the bulb to the output of my sponge filter. It fits perfectly, and the only additional thing you need to do is cut a small hole in the top, so that the air can escape the shell. I know that probably isnt too clear, but hopefully I can take a picture of it tonight.