Thanks for asking this question as I am just in the same dilemma but with a 90 gallon that have nitrates at 10 and I am looking for a cheap way to sump it as I have been blowing my budget with my tank.  Hope you don't mind but I will tag along. 
  
Leanne P 
		
	
		
		
		
		
		
	
		
		
	
	
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