Harvey if you are thinking of a skimmer. I have a ATI BM250 and i love it 10" chamber short and fat neck along with a huge collection cup. I will never buy another skimmer this thing rocks like no tomorrow. its alot cheaper then a BK and with a dual custom mesh mod on the sicci pumps and super quite I some times have to look in to see if the skimmer is working. Is rated for 500 gallons. and it pulled amazing crap out of the tank. 
		
	
		
		
		
		
			
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				180 starfire front, LPS, millipora  
Doesn't matter how much you have been reading until you take the plunge.  
You don't know as much as you think.
			 
		
		
		
		
	
		
		
	
	
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