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					Originally Posted by  waynemah
					 
				 
				I'll predict it's the test kit!    
			
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 +1. I would borrow a buddy's phosphate test kit first before making a lot of changes. However, if PO4 is that high try to control reduce it and see if you are a le to find the source of the PO4 ( rocks leaching etc...). I am assuming you are running a full zeo routine and in the early stages you are dosing allot of food  a k into the tank. I think running GFO will be ok.  Good luck and hope you will be able to solve the problem.  
		
	
		
		
		
		
			
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