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					Originally Posted by reef_raf
					
				 
				
	Quote: 
	
	
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					Originally Posted by Murminator
					
				 
				Tap water is 10/Lbs gallon. the specific gravity is 1.000 
			
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 My references say 8.345404 pounds per gallon....  
			
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 must be US gals    
		
	
		
		
		
		
			
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				Murray  
 
  
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