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			#11  
			
			
			
			
			
		 
		
		
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			 Is buying bottled RO or DI water from the grocery store not an option? I started my 20g with tap water and promptly switched to store bought RO. Since then my algea issues have been slowly going away. I find that with a 20g tank I only use about a bottle and a half of water a week( between top-offs and my 4g ish water change) so it only costs about $7. 
		
	
		
		
		
		
		
	
		
		
	
	
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