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			 Hi just would like to know what type of piping to use with sump to tank overflow (pvc or flex tube type hose ) should I have some shut offs or one way valves also would a 20 gal be the correct size sump tank for a 72 gal aquarium. still looking for the right type of sump to buy or build. 
		
	
		
		
		
		
		
	
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