If your tank is doing well and you like the look of sand why change what you're doing? Unfortunately, not all tanks can handle the extra nutrients of an un-maintained sand bed. 
 
My tanks have been bare bottom for the past 6 or 7 years. I like the look, and I don't miss dealing with sand and the crud it collects. But of course this is just my preference. 
		
	
		
		
		
		
		
	
		
		
	
	
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