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			#5  
			
			
			
			
			
		 
		
		
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			 If you have high phosphates gfo can be exhausted in a very short time (days) so if your battling problems it might be a good idea to test ( from the output of the reactor) frequently to stay on top of the problem. 
		
	
		
		
		
		
		
	
		
		
	
	
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