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					Originally Posted by  Coralgurl
					 
				 
				Seems like it's coming from the display tank, sump isn't that bad. I moved one of the power heads down a few inches to try to move more flow over the sand and I'm seeing more solids floating around, had to look closely to make sure it wasn't bubbles. 
  
Mentioning a dead snail, I added 20 sand snails but haven't seen a single one come out....could they be causing this if they are dead?? 
			
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 It happened to me before, it took me a couple days before I found a couple of dead snails causing that kind of smell. If it smells like something rotten, I doubt very much they are the culprit.