ok tested my make up water about an hour or so after mixing it.   Comes out to 0 ppm ..  
 
the only thing I can see then is that in the next 3 days it has enough time to start producing significant nitrates.   I am gonna test it in the morning and see what happens.    
 
May change how I do my water changes. 
		
	
		
		
		
		
			
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				Chad
  
			 
		
		
		
		
	
		
		
	
	
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