yes, that tang needs a new home NOW!  not when you can afford an upgrade.  Also,  it WILL outgrow a 70g in about 6-8 months as well.  Best thing is either take it back to the fish store, or sell/give to someone who has a large enough tank.   I housed a Yellow Tang in my 45g corner tank for 4 months.  He is a totally different fish now that he's in a 150g.   They get bursts of speed and need room to run.  You wouldn't house a racehorse on a city lot back yard, would you? 
		
	
		
		
		
		
			
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				Dan Pesonen 
 
 
Umm,  a tank or 5
			 
		
		
		
		
	
		
		
	
	
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