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			#27  
			
			
			
			
			
		 
		
		
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			 I do 2-3 water changes per year and each one about 150 gallons. I do syphon the sand to get rid of any detritus in there. My last water change  was October but I dose cal alk mag and trace elements. Then a big water change to "rebalnce" the trace elements. 
		
	
		
		
		
		
		
	
		
		
	
	
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