I'm not a big fish person but I thought I'd get a little fish tank for my dorm room. What it seems like is the bubbles coming from the chest just kick up alot of soot that makes the water look cloudy. I bought water conditioner from petsco but that doesn't seem to have cleared the water. I included a picture so you can see what I'm talking about, not great pic but pretty good from my new Nexus One!!
http://lh6.ggpht.com/_s7dg-ep3G8c/S1zbJ1r-IAI/AAAAAAAAACc/PFdPGgpo3lE/s640/2010-01-24 13.09.33.jpg
http://lh6.ggpht.com/_s7dg-ep3G8c/S1zbJ1r-IAI/AAAAAAAAACc/PFdPGgpo3lE/s640/2010-01-24 13.09.33.jpg