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					Originally Posted by  George
					 
				 
				Hate to be a devil advocate, but what is the minimum tank size length wise for a powder blue tang? is it 3'x3' , 2'x2' or 1'x1' if someone have nothing in the tank but water and the fish? Couldn't the fish swim around in a circle in a 1'x1' tank and not hitting the wall.    
			
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 at what point does 1ft , 2ft or 10ft make a difference to a fish that swims a sq kilometer a day?