much darker than green tea.  there is a slight fizzling noise that be slightly louder on some days, but it's really nothing more than a whisper.   
 
imo the 9002 would definitely serve well on a 30g.  MCE300 would be overkill, but would get the job (and then some) done while allowing for possible upgrades down the road. 
		
	
		
		
		
		
		
	
		
		
	
	
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